ETF Investing

Před několika měsíci vyústila vyostřená debata o filtrech a Core vs Knots v kontroverzní návrh BIP-110, původně známý jako “BIP-444”, neboli Reduce Data Temporary Soft Fork, který má za cíl dočasně omezit časté způsoby vkládání netransakčních dat na bitcoin. Je tento návrh efektivní? Jaké kroky navrhuje? Co se musí stát pro jeho aktivaci a jaká je situace dnes? Lukáš, náš expert na Rust a bitcoin, vám podrobně přiblíží tento problém z každého hlediska. **🦀 PREZENTACE** Tato přednáška představuje BIP-110 v kontextu debaty Knots VS Core, tedy o spam filterech. BIP-110 se snaží se vypořádat se s domnělým i reálným spamem změnou pravidel Bitcoin konsensu, tím že zakáže použití určitých op-kódů a omezí maximální velikosti dat u jiných opcodes. Na BIP-110 se podíváme 1. Z pohledu technického: Co přesně se snaží změnit a proč, kterým metodám se snaží zamezit, a zda zabraňuje některým legitimním použitím bitcoinu 2. Z pohledu časové osy a komunity: Kdy a kým byl BIP-110 vytvořen, kdy se aktivuje a jaké podmínky pro aktivaci musí splnit, jak fungují User-Activated Soft Forky, co se může stát, pokud k jeho aktivaci dojde, a co se může stát, pokud ne 3. Z pohledu efektivity: Jak zapadá do existujících způsobů vkládání netransakčních dat na blockchain, kterým způsobům nezamezuje, a jak se to projeví na ceně vkládání dat **🦀 NETWORKING** Po přibližně 60minutové prezentaci a Q&A zůstáváme na networking u piva. Zůstáváme do 22:00. * Registrace je zdarma. * Bude pití i něco k jídlu. * Odměny za nejlepší otázky. * Knihy od Braiins zdarma. **🦀 PŘEDNÁŠEJÍCÍ** Lukáš Hozda je expert na Rust, autor knihy Building Bitcoin in Rust a lektor kurzů Rust a Advanced Rust na Univerzitě Karlově. Přes den pracuje v pražské bitcoinové softwarové společnosti Braiins, kde jeho oficiální pracovní titul zní Braiins Superman. * Stáhněte si jeho eBook Building Bitcoin in Rust zdarma. * Sledujte Lukáše na X: https://x.com/LukasHozda Pokud vás zajímá seriózní Rust engineering, přidejte se k nám. 🔗 https://braiins.com *** **ENGLISH** 🇺🇸 **Analysis of BIP-110: Timeline, Details and Impacts. Can it work?** A few months ago, a heated debate about filters and Core vs Knots culminated in the controversial proposal BIP-110, originally known as 'BIP-444', or Reduce Data Temporary Soft Fork, which aims to temporarily restrict common methods of inserting non-transactional data onto Bitcoin. Is this proposal effective? What steps does it propose? What needs to happen for it to be activated, and what is the situation today? **🦀 THE PRESENTATION** This lecture presents BIP-110 in the context of the Knots vs Core debate, specifically about spam filters. BIP-110 attempts to deal with both alleged and real spam by changing Bitcoin consensus rules, by banning the use of certain op-codes and restricting the maximum data sizes of other opcodes. We will look at BIP-110 from: 1. A technical perspective: What exactly it tries to change and why, which methods it tries to prevent, and whether it blocks some legitimate uses of Bitcoin 2. A timeline and community perspective: When and by whom BIP-110 was created, when it activates and what conditions it must meet for activation, how User-Activated Soft Forks work, what may happen if it is activated, and what may happen if it is not 3. An effectiveness perspective: How it fits into existing methods of inserting non-transactional data onto the blockchain, which methods it does not prevent, and how this will be reflected in the cost of inserting data **🦀 THE NETWORKING** After about a 60min presentation and Q&A we will stay to network over a beer, we stay until 22:00. * Register here for free entry. * Drinks and snacks provided. * Giveaways for the best Q&A questions. * Braiins Bitcoin books for free. **🦀 THE SPEAKER** Lukáš Hozda is a Rust expert, author of the book Building Bitcoin in Rust, and a lecturer of Rust and Advanced Rust at Charles University. By day, he works at the Prague-based Bitcoin software company Braiins, where his official job title is Braiins Superman. * Download his free eBook [Building Bitcoin in Rust](https://braiins.com/books/building-bitcoin-in-rust) * Follow Lukáš on X: [https://x.com/LukasHozda](https://x.com/LukasHozda) If you are interested in serious Rust engineering, join us. 🔗 [https://braiins.com](https://braiins.com/)

SPEED FRIENDING - COCKTAILS - PRIZES & MORE Let's meet each other! In an effort for community building we are doing The Wednesday Club once a month great venues such as KONTAKT BAR and LE VALMONT, amazing hidden cocktail bars in the heart of Prague, opening their doors exclusively to you for this event. This event is perfect for a night out if you want to meet some new people. You will be able to spend some one-on-one time with each of them, meet friends for life or just to have some interesting encounters. Everyone is welcome as there are no age restrictions for this event. Each round will take 5 minutes and then a bell will ring and it's time to move on to the next person to discover. Not only will you leave with new friends but there are also some opportunities to win prizes. But for that you’ll have to come discover the event for yourself… Tickets: [Mandatory registration here](https://connect.boomevents.org/en/somethingnew-uqvwe/the-wednesday-club-international-speed-friending-asaur) We are very excited to meet you! Somethingnew

**Join us in Prague for a Snowflake User Group evening hosted by Everpure (formely Pure Storage).** This edition will bring together Snowflake product updates and practical lessons from teams using the platform in production. We’ll begin with a look at recent developments across the Snowflake ecosystem, including selected new features and broader trends shaping the data platform space. The evening will also include a customer session from Everpure's Metrics team, focused on large-scale data pipelines in Snowflake, including Snowpipe Streaming and experience from high-volume production environments. We’ll round things off with an informal fireside chat with a guest from Snowflake, followed by networking, community discussion, and the traditional Snowflake quiz. **EVENT DETAILS** * **What’s New in Snowflake** Kick off the evening with an overview of the latest developments in the Snowflake ecosystem. We’ll cover new features, emerging trends in the data platform space, and a few practical insights from real-world projects. * **Customer Story: Data Pipelines at Scale** Our host company Everpure's Metrics team will share how they use Snowflake in their data pipelines. The session will focus on large-scale ingestion using Snowpipe Streaming, handling around 10 TB of data per day, and lessons learned from operating high-volume pipelines in production. * **Fireside Chat with Snowflake** An informal conversation with a guest directly from Snowflake. We’ll discuss recent platform developments, what’s coming next, and interesting topics shaping the future of data platforms. The chat will be hosted and moderated live. * **The Snowflake Quiz** As always, we’ll close with the Snowflake quiz, a few goodies up for grabs, and time to connect with fellow data professionals over drinks. **RSVP** here [See Snowflake in Action: Prague User Group](https://usergroups.snowflake.com/events/details/snowflake-prague-presents-snowflake-in-action-prague-user-group-hosted-by-pure-storage-1/).

We are a group of runners who meet most weeks for a run around the beautiful Vltava River's edge. You can bring your running shoes straight from the office/home office if you don't have time to stop at home. There will be a place to put your bags in the Cafe. We will run about 9 km along the river and have a drink afterwards. Paces vary! We will meet in the square near Kavarna Liberal (Hermanova 6), near the Vltavska metro/tram stop at 6:30 on Wednesday. See you there!

**Hosted by Sky Czech Republic.** Doors are open from 5:30 pm, talks will start at 6:00 pm. **1\. Marek Svitok \(Sky\) \- Elegance and Safety in Goroutine Management** Concurrent programming is a core strength of Go, but managing multiple goroutines while handling errors and synchronization can quickly become complex and error-prone. The golang.org/x/sync/errgroup package provides a simple and effective abstraction for running multiple goroutines concurrently, propagating the first error encountered, and ensuring all routines complete before proceeding. In this article, we explore why errgroup is a valuable tool, how to use it effectively, and what design patterns emerge from its usage. We also examine how one might implement similar functionality manually, highlighting the pitfalls and edge cases that make a manual approach cumbersome. By comparing manual implementations with the idiomatic errgroup usage, we aim to demonstrate why adopting this package leads to safer, cleaner, and more maintainable concurrent code in Go. **2\. Vilibald Wanca \- Nail the Basics \- S01E03** Go does not use `try/catch` for normal error handling. Instead, it treats errors as explicit return values, while `panic` is reserved for truly exceptional or unrecoverable situations. A panic stops normal execution, runs deferred calls, and can only be intercepted with `recover` inside a deferred function. This makes `panic/recover` closer to an emergency escape hatch than a general exception system. The result is a model that favors clarity and explicit control over hidden flow. By attending the event I agree that photographs and video recordings from this event may be used by Sky Czech Republic for employer branding and promotional purposes across company websites, career pages, social media, third-party profiles, and other communication materials.

**5-a-side Football** practice at Rajská Zahrada artificial grass pitch. No cleats shoes. Maximum of 15 participants for a 3 teams of 5 rotating. **Kick off at 18h00**. Everybody is welcome, no age, gender nor any restriction of any type to join. Cost: **90 crowns**. Please send the money using the **QR Code** stored here: https://imgur.com/a/G8NWGjM In case of any Opt-out within 24h of the session, or no show, the payment will be due (you still can ask someone to come instead of you, as your spot will be booked)

Calling all board game enthusiasts in Prague! Join us for an exciting evening of fun and games at Sophie's Hostel! Whether you're a seasoned strategist or just looking for a casual night of entertainment, this event is perfect for everyone. Bring along your favourite board games or discover new ones from our collection. From classic favorites like Settlers of Catan, Carcassone or Ticket to Ride to modern gems like Codenames, Wyrmspan or Azul; from the simple UNO, Jenga or Pachisi to heavyweights like Brass: Birmingham, Root or Inis - there's something for every taste! Connect with fellow expats, make new friends, and challenge your skills in a welcoming and laid-back atmosphere. Don't worry if you're new to the city or don't know anyone — this is the perfect opportunity to mingle and bond over a shared love of tabletop gaming. Every Wednesday from 19 to... whenever they start preparing breakfast at the hostel. Mark your calendars, gather your game crew, and get ready for an unforgettable night of board game bliss! Let's roll!

It's easy to get the idea that philosophy is largely an abstract and conceptual endeavor–studying theories that try to explain the universe, morality, or language, and then arguing until we either prove those we disagree with wrong or at least reach a smug sense of clarity. But is that all that philosophy has to offer? Back by popular demand, this month we'll be diving deeper into the reflections of **Pierre Hadot** by beginning his essay **Spiritual Exercises**. In this essay, Hadot argues that **ancient philosophers didn't just theorize about what a good life might be, but practiced it through disciplines of attention, meditation, and self-examination aimed at transforming how one sees and lives in the world**. The essay invites us to ask **whether philosophy might still serve that purpose today**. Hadot specialized in **ancient Greek and Roman philosophy--especially Stoicism, Neoplatonism, and early Christian thought**–as was known for his scholarship on **Marcus Aurelius, Plotinus, and ancient spiritual exercises**. His work has influenced many contemporary philosophers, classicists, and the modern revival of philosophy as a lived practice. As noted in the title, this will be the first of two sessions. We're splitting the text into two parts in order to give everyone a chance to fit the text into their busy lives, as well as to give us space to move more slowly through the text together. \*\*\* Below is a PDF copy of Hadot's book Philosophy as a Way of Life. This session will cover up to p.93 (ending at 3. Learning to Die). If you have trouble accessing it, send the host a message–extra copies are available. Link: [https://ia800203.us.archive.org/7/items/PierreHadotArnoldDavidsonPhilosophyAsAWayOfLifeSpiritualExercisesFromSocratesToFoucault1995/Pierre%20Hadot%2C%20Arnold%20Davidson%20Philosophy%20as%20a%20Way%20of%20Life%20Spiritual%20Exercises%20from%20Socrates%20to%20Foucault%20%201995.pdf](https://ia800203.us.archive.org/7/items/PierreHadotArnoldDavidsonPhilosophyAsAWayOfLifeSpiritualExercisesFromSocratesToFoucault1995/Pierre%20Hadot%2C%20Arnold%20Davidson%20Philosophy%20as%20a%20Way%20of%20Life%20Spiritual%20Exercises%20from%20Socrates%20to%20Foucault%20%201995.pdf) \*\*\* We’ll have tea and light snacks, but please feel free to bring any drink or snack you’d like to share! This event will be hosted in an apartment with a well-trained dog who will be happy to meet you. If anyone has concerns about dogs, let me know so I can be mindful about keeping her from bothering you. The buzzer is Everett and Mainous—we’re on the 5th floor, apartment 16. Meeting structure: We will start with a brief summary of the key ideas Hadot presents then move to open discussion. Please read the text in advance, make highlights, and note any thoughts or questions you find interesting and compelling.

Weekly Czech Conversation Meetup 📅 Every Thursday \| 🕢 19:30–21:30 📍 Tequila Tales, Újezd 409/19, Praha 1 Are you an expat in Prague learning Czech at A1 or A2 level? Ready to stop just studying and start speaking? Join our Weekly Czech Conversation Meetup – a focused, interactive session designed to help you speak more confidently in Czech through fun, practical, peer-based learning. 🎯 What to expect: Structured, casual Czech-speaking sessions Fun language games, real-life scenarios, group challenges Peer-to-peer learning (no teachers – just motivated learners!) No grammar overload – just speaking and using what you know 🧠 Who is this for? A1 and A2 level learners (not for absolute beginners) Expats in Prague who want to practice Czech in a supportive space People who are ready to actively participate – speaking is a must! 📝 Important: Preparation is required. Each week, you’ll get a short prompt or task in advance. Everyone must come ready to engage. 💬 Why join? Build real-life speaking skills Break the fear of using Czech Meet other motivated learners Get out of your Duolingo comfort zone! 🌍 This is a focused Czech-only session, happening from 19:30 to 21:30, as part of the larger Uninstall Duolingo Language Exchange night every Thursday.

There is a wisdom that lives in the sea — in its depth, its movement, its light. In this three-part series, we begin each ceremony with cacao to root into the body, soften, and arrive. From there, breath becomes a doorway into the inner waters — into movement, feeling, release, and deeper contact with what lives within. Each ceremony explores a different quality of the inner ocean: Fluidity — trusting the flow of life Depth — the courage to feel Luminosity — the light beneath the surface You are welcome to join the full journey or come to any ceremony individually. Each session is a complete experience on its own, while also forming part of a deeper unfolding process. LUMINOSITY - This evening is an invitation to reconnect with your inner light and vitality, soften into presence, and experience a sense of expansion and aliveness. This practice includes intensive breathwork and cacao. It is not suitable for those who are pregnant or have epilepsy, glaucoma, serious heart conditions, severe cardiovascular disease, unmanaged severe hypertension, or acute psychiatric disorders. If you have any health concerns, please reach out in advance so the practice can be adapted safely. If you have food allergies or sensitivities, please also let us know beforehand. When: Thursdays 9/4, 16/4, 23/4 at 19:00 Price: 450 CZK per ceremony / 1100 CZK full cycle via atmaprague@gmail.com

Hola tod@s! Tenemos otra reunion este viernes en Pivni Bar Blanička! Sois muy bienvenidos!

## **What IdeaVerse is about** **We meet usually once a month to discuss some of the current challenges as well and perhaps come up with new ideas on how to overcome them. For those who came regularly, this next meetup would be slightly different. We will do a workshop on solving real world problems.** The problem we will attempt to solve is the dissolution of communities and spaces where people connect in person, and with it, our increased isolation and loneliness. There are many reasons why this is happening: \- replacement of religion with science as a beacon of meaning\, which seems to be much less great at inspiring connection; \- economic forces boosting our ego\, and make it easier to pay for random strangers for help then making lasting connections with people\. \- political polarization \- \(anti\)social media \(as I call it\) and now AI offering simulations of relationships\. \- climate change increasing our distrust in a better future and the importance of investing in life and people\. \- closing down of third spaces like churches\, malls and retail stores \(due to online shopping\)\, youth centers and increase in remote work\. These are all causes we'll explore, together with examples of how other people expressed they feel about this issue from research, reasons why this issue exists as well as examples of small victories against this tide. We'll work in small groups putting all this knowledge together with out imagination and attempt to find local solutions to similar problems here in Prague. This is is more than a discussion. It's an exploration of our ability to work together to effect change in ourselves and in our social circles. **Some suggested reading/watching:** 1. "Contrary to the perception that isolation and loneliness primarily affect older people in high-income countries, they impact the health and well-being of all age groups across the world. One in four older people experience social isolation and the rates are broadly similar in all regions. Among adolescents, between 5­­–15% experience loneliness, according to research findings." (3 minute read - [WHO launches commission to foster social connection](https://www.who.int/news/item/15-11-2023-who-launches-commission-to-foster-social-connection)) 2. "Many popular sitcoms center around what's known as a third place-- for example, Central Park in Friends or the Bull and Finch Pub from Cheers. Like the theme song goes, it's somewhere where everybody knows your name, where you can socialize in a place other than your home or work and build some community. But with the whole world accessible on your smartphone, it's kind of hard to resist the call of the couch. And it's hurting us more than we think." (10 minute Podcast [Third places’ may be the answer to America’s loneliness epidemic](https://www.mprnews.org/episode/2024/05/23/third-places-may-be-the-answer-to-americas-loneliness-epidemic)) 3. “These verdicts mark an unsurprising breaking point. Negative sentiment toward social media has been building for years, and now it’s finally boiled over,” said Mike Proulx, a director at Forrester, a market research company. (4 minute read - [How the landmark verdict against Meta and YouTube could hit their businesses](https://www.aol.com/finance/landmark-verdict-against-meta-youtube-100000070.html)) **The meeting is free to attend, but please buy a drink or two at our patron's place, to make them happy.**

Get ready for an unforgettable day in nature — we’re heading to the stunning Bohemian Switzerland National Park, and you’re invited! Located in northern Bohemia near the German border, this area is famous for its towering sandstone cliffs, deep forests, hidden gorges, and breathtaking views. It’s one of the most beautiful natural landscapes in the Czech Republic! We'll explore iconic landmarks like Pravčická Gate — the largest natural sandstone arch in Europe — Edmund’s Gorge, and places where scenes from The Chronicles of Narnia were filmed. Along the way, we’ll take in the untouched beauty of the landscape, with majestic rock formations, lush green valleys, and breathtaking natural stone bridges all around us. Distance : 12km walk (about 7 hours) Difficulty Rating : Moderate **Tour Highlights :** • Hassle-free day trip to Bohemian Switzerland National Park • Professional and friendly guide • Transportation by air-conditioned bus • Entrance fee to Bohemian Switzerland National Park • Visit Pravčická brána, the largest sandstone rock arch in Europe • Enjoy magnificent views of the surrounding mountains, the sandstone rock formations, gorges, forest, and waterfalls. • Immerse yourself in real-life fantasy movie locations • Take a boat to Edmund's Gorge, the deep canyon of the Kamenice River • Enjoy typical Czech food in a local restaurantal restaurant You can pay for the trip via: • Bank transfer: 7392420507/6363 • Revolut: @augustetqc • Wise: @agustind162 More information at : https://www.facebook.com/events/1487189763108580/

Come along to Pohoda’s stall to help run, set up and clean up for the flash market! Pohoda supports quality of life for mental disabilities in adults, including health and social services. The flash market is an activity that contributes to their fundraising and sells products that were made by their community. If you have any questions, contact Julia +420 737 890 656

If you are interested in selecting investment choices for your 401(k) or other workplace savings plan, minimizing your income tax liability, or identifying the most effective investments for your brokerage account, we are the group for you. We are a local chapter of Bogleheads, whose investment strategy can be found here: https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy Or you can peruse the Boglehead forum here: https://www.bogleheads.org/index.php I look forward to seeing you there. Mark Vonder Haar

**Welcome to the Women’s Columbus Bogleheads® Sub-Group** This sub-group is for **women who want to learn and discuss finances in a safe, supportive space**. For those interested in moving towards financial independence and retirement by learning investment basics, choosing your 401(k) investments, minimizing taxes, and more. We’re a local chapter of **Bogleheads®**, following a long-term, practical investment philosophy: [Investment Philosophy](https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy): https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy [Bogleheads Forum](https://www.bogleheads.org/index.php): https://www.bogleheads.org/index.php No question is too small, and no experience is too simple. Share, ask, and learn — at your own pace, without judgment, in a group of like-minded women. Let’s build confidence and knowledge **together**!

Learn how seller finance and notes can create cash flow and new deal opportunities with 40-year investor Eddie Speed **FREE TICKET** 🎟️ https://www.eventbrite.com/e/how-to-structure-real-estate-deals-using-seller-finance-and-notes-tickets-1984826171509?aff=cicmeetupapp Most real estate investors only know one way to make money: Buy the property. Fix the property. Rent it or sell it. But there’s another side of real estate that can create cash flow, flexibility, and opportunity without only focusing on owning more property. At this month’s Columbus Investors Club, Tiffany and Josh High are sitting down with Eddie Speed - a real estate veteran with 40 years of experience who has closed more than 50,000 note deals. He has spent decades helping investors understand how to structure deals through seller finance and notes, and how to think more like the bank instead of just the buyer. This will be a practical conversation around a part of real estate most people have heard about, but very few truly understand. If you’ve ever wanted to know how to create more opportunities in deals, generate cash flow in a different way, or understand how seller finance actually works in the real world, this is a night you want to be in the room for. You’ll walk away thinking about deals differently, seeing new possibilities, and understanding how creative structuring can open doors that traditional investing alone can’t. **What You’ll Learn** * How seller finance works in real estate deals * How notes fit into real estate and create opportunity * How to structure deals more creatively * How investors generate cash flow by focusing on the payment * How to think like the bank instead of only focusing on owning the property * How this strategy can create flexibility in today’s market **Open Q&A - Ask Eddie Anything About** * Seller finance and how to use it in real deals * How notes work in a practical, beginner-friendly way * Creating cash flow without only relying on rentals * Structuring deals that others might miss * How experienced investors think differently about financing * Common mistakes investors make when they only focus on the property **Why You Should Be in the Room** Because the investors who win in the long run know how to do more than just buy houses. They know how to structure.They know how to create terms.They know how to see opportunities other people miss. This is the kind of conversation that can expand the way you think about real estate entirely. Come ready to learn, ask questions, take notes, and connect with people who are serious about growing in this business. **Reserve your free seat now - and be part of the conversation.** Grab your spot here ➡️ https://www.eventbrite.com/e/how-to-structure-real-estate-deals-using-seller-finance-and-notes-tickets-1984826171509?aff=cicmeetupapp

**Hosted by Unity of Columbus \| Facilitated by Carisa Holmes\, EFT Practitioner** Join us for a powerful and uplifting workshop where you’ll be introduced to **Emotional Freedom Techniques (EFT), also known as tapping**—a simple, effective method that helps release stress, calm the mind, and restore emotional balance. In today’s fast-paced world, many of us carry tension, anxiety, and emotional blocks that impact our well-being. This interactive session will guide you through practical techniques you can use anytime to create a sense of peace and clarity.

Bring your business cards and network in person with other business professionals! Gold Star Referral Clubs is one of the most established professional networking organizations in the country, with multiple groups in central Ohio. Join us!