co-founder & CTO @swan. Author Inventing Bitcoin. Shadowy Super Coder.

Chicago, IL
Joined December 2006
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Yan at Swan retweeted
ELECTRUM BITCOIN WALLET CONFIRMS CRITICAL SECURITY VULNERABILITY EXPLOITED IN THE WILD Electrum has disclosed a high-severity vulnerability allowing malicious servers to trick users into sending Bitcoin to an attacker when increasing a transaction fee. The attack works by intercepting a broadcast transaction and replacing it in the wallet’s history with a fake transaction redirecting funds to an attacker-controlled address. If the user attempts to increase the fee using Replace-by-Fee (RBF), Electrum can sign the malicious transaction, sending the Bitcoin to the attacker. Electrum confirmed two reported incidents, including one user who lost funds. Attackers even generated addresses matching the last four characters of the intended recipient’s address. The vulnerability affects versions before 4.8.3 and has been patched in the latest release. Users are urged to update immediately and verify all destination addresses and amounts before signing transactions.
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Yan at Swan retweeted
Tailworm. We have zero-trust in our infrastructure. (Tailscale audit) tailworm.com/
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[ ZOOMER ] A16Z TO DROP CRYPTO FROM ITS FLAGSHIP BLOCKCHAIN FUND'S NAME, FOCUS ON OTHER INVESTMENTS, ITS FIRST FOUNDING MEMBER TO ALSO LEAVE: THE INFORMATION
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“I’m already crushing it with stocks. Why add Bitcoin?” In our 12-year backtest with quarterly rebalancing, adding just 2.5% Bitcoin to a 60/40 stock-and-bond portfolio increased investment gains by 39%, and barely any extra portfolio volatility. Then, we tested 20%... 🚀
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Logically, investors OUGHT to evaluate Bitcoin the same way they evaluate any addition to their holdings, by what it contributes to the whole portfolio on a risk-adjusted basis. But I'm extremely understanding of families and business owners who are hesitant to add some Bitcoin to their investment portfolio. It IS relatively new, and we didn't grow up with it. That means we have to learn about it as we buy it.
“I’m already crushing it with stocks. Why add Bitcoin?” In our 12-year backtest with quarterly rebalancing, adding just 2.5% Bitcoin to a 60/40 stock-and-bond portfolio increased investment gains by 39%, and barely any extra portfolio volatility. Then, we tested 20%... 🚀
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Yan at Swan retweeted
Effective Immediately, all organizations using PHP for their systems are advised to be prepared for an update addressing two critical vulnerabilities. PHP is widely used for web applications. These vulnerabilities often provide a direct path to the server's file system or database. If an immediate update is not feasible, it is recommend that organizations take the system offline until it can be fully mitigated. NSA will follow up shortly with more specific guidance.
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If you run a php app now may be a good time to tell your clankers to rewrite it in a sane language
if this affects the default installation of PHP We are fucked up CVE-2026-109618 CVE-2026-109619 PHP RCEs with a CVSS score of 10.0 ☠️ news.ycombinator.com/item?id…
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The Economic Roots of Unrest in France • Government spending at 57% of GDP • Public debt at 119% of GDP • Borrowing in a currency it can’t print What could go wrong?
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If I want to give Bitcoin to my kids, I can send it to a wallet they control on a Sunday night. I don't need to open another financial account or wait for a bank to open. You'd have to offer me a lot more value in an ETF to give that up.
I have friends in countries where Bitcoin is the only asset they trust and can count on. Their sovereignty multiple might as well be infinity.
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WHAT IS A BITCOIN HARDWARE WALLET?!? Today we’re continuing our series of simple Bitcoin explainers you can BOOKMARK and SEND to friends, family, colleagues, or anyone trying to understand Bitcoin. Hint: Your Bitcoin isn’t actually stored in your hardware wallet 😎
HOW DO YOU EXPLAIN BITCOIN MINING?!? BOOKMARK this one for the next time your friends, family, colleagues, or classmates ask what Bitcoin mining actually is 😎 It always helps me to hear it again. Thanks @skwp for the framework!
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“This is not a cryptographic break, new attack, or weakness in the ECDSA curves. In fact, this makes us more confident the curves were chosen without any backdoors or intentional weaknesses”
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Are cracks in the AI infrastructure buildout finally starting to show? One of CoreWeave’s bonds hit a 15% yield this week, high even by junk-bond standards. $CRWV Tighter credit can delay data centers, cut supplier orders and slow economic growth long before anyone goes bankrupt.... On today's OUTSIDE MONEY
The Top 5 Reasons AI Can Win and Investors Can Still Lose --------------------- The biggest risk isn’t that AI fails. It’s that AI succeeds, but not fast enough to justify everything being built and financed around it.
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You can be bullish on America without being bullish on the dollar. A Bitcoin standard wouldn’t take away our farmland, energy resources, navigable rivers, or protective oceans. It wouldn’t stop talented people from wanting to move here and build something. America could remain the world’s leading power long after the dollar loses its monetary dominance. As a Bitcoiner, I find that a lot more compelling than betting on American collapse. What if the American empire is just beginning?
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What if the American empire is just beginning? We’re only 81 years into America’s run as the world’s leading power. Rome dominated the Mediterranean for nearly six centuries. Why are so many people convinced America’s time is almost up? The European maritime empires had relatively small homelands and powerful neighbors. America has the resources and internal market of a continent, plus protective oceans on both sides. Enormous agricultural and energy resources. Rivers connecting our heartland to world markets. An extraordinary ability to attract talented people and turn them into Americans. There has never been a global power based in this particular part of the world before. Assuming we’ll follow the same trajectory as earlier powers could be a huge mistake. China needed an extraordinary amount to go right to surpass that combination. We even helped them along with American capital, technology, and market access. But China’s share of the world economy, measured in dollars, has already fallen from its peak, losing ground relative to America in recent years. Could America stay on top for another 500 years? We don’t know. But we don’t know that it can’t, either. America could operate on a Bitcoin standard and still be the world’s leading power. The dollar didn’t create our geography, resources, nor our capacity to invent, build, and inspire. On today’s OUTSIDE MONEY:
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If you bought a Ledger device from a reseller you may want to move funds immediately.
LEDGER SUPPLY CHAIN ATTACK MAY HAVE BEEN EXPOSED BEFORE MASS WALLET DRAIN Former Mt. Gox CEO Mark Karpelès may have inadvertently triggered a coordinated wallet drain after publicly exposing physically modified Ledger devices containing hidden surveillance implants. On October 8, Karpelès warned that counterfeit or tampered Ledger devices were being sold with concealed SIM cards capable of transmitting stolen seed phrases. The implants reportedly intercept data sent to the device’s screen, allowing attackers to capture recovery phrases displayed during wallet setup. Crucially, these devices can reportedly pass Ledger’s official Genuine Check because the original secure element remains intact. The verification process cannot detect unauthorized physical modifications. One theory now emerging is that attackers had been harvesting seed phrases from compromised devices, waiting to drain multiple wallets simultaneously. Karpelès’ warning reportedly attracted roughly 90,000 views, potentially alerting the attackers that their operation had been exposed and prompting them to move stolen funds. Karpelès says one compromised Ledger he examined originated in Malaysia, arrived in flawless shrink-wrap packaging, and contained an implant cleverly concealed beneath the screen. The suspected attack vector is a hardware supply chain compromise, not a cryptographic vulnerability. The connection between Karpelès’ warning and the subsequent wallet drains remains unconfirmed, as does whether the same implants were responsible. If established, the incident would demonstrate how compromised hardware can undermine self-custody even when a device passes manufacturer authentication.
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I MADE A BETTER BITCOIN!!! 😎 Today we’re going to REDESIGN BITCOIN, and we’re gonna change a few things...
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This is really cool
After six years in stealth, Atomic Machines is out. Our mission: on-demand, universal command of matter. First beachhead: the Matter Compiler, an AI-native manufacturing system that builds working micro-machines from code alone. No per-product tooling. No process development. Different code, different machine.
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Replying to @jeffholden
Is this the Star Trek replicator?
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