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Coldcard Wallet Hack: What Happened and What to Do Now
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🚨 CHECK OUT TBL PULSE: In this episode, Nik and TBL's Demian Schatt cover a breaking security situation: a seed-generation vulnerability in Coldcard hardware wallets that has exposed some bitcoiners to theft, with reports of wallets being swept over the last twenty-four hours. Nik, speaking as a researcher rather than a cryptographer, explains how bitcoin seed phrases are generated, why the entropy behind a seed is what keeps it safe, and how Coldcard's default seed generation left certain users vulnerable while those who added dice-roll entropy or a passphrase are better protected. He explains why bitcoin ETF holders are not affected and why he has long favored diversified storage. The video is a call to action: check your wallet and how your seed was generated. Get Nik's weekly bitcoin and macro research: The Bitcoin Layer is proud to be sponsored by SOUND HSA. A Health Savings…
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Analysis last updated August 22, 2026 · Read the methodologyRead the creator’s original video description
🚨 CHECK OUT TBL PULSE: In this episode, Nik and TBL's Demian Schatt cover a breaking security situation: a seed-generation vulnerability in Coldcard hardware wallets that has exposed some bitcoiners to theft, with reports of wallets being swept over the last twenty-four hours. Nik, speaking as a researcher rather than a cryptographer, explains how bitcoin seed phrases are generated, why the entropy behind a seed is what keeps it safe, and how Coldcard's default seed generation left certain users vulnerable while those who added dice-roll entropy or a passphrase are better protected. He explains why bitcoin ETF holders are not affected and why he has long favored diversified storage. The video is a call to action: check your wallet and how your seed was generated. Get Nik's weekly bitcoin and macro research: The Bitcoin Layer is proud to be sponsored by SOUND HSA. A Health Savings Account is the most tax-advantaged account in the US tax code: contributions are tax-deductible, growth is tax-free, and withdrawals for qualified healthcare expenses are tax-free too. But most people leave their HSA sitting in cash, losing purchasing power year after year. SOUND HSA lets you hold real bitcoin inside your HSA instead. Not an ETF, not a paper claim, but real bitcoin secured in multi-institutional, multi-signature cold storage. Use code TBL to waive the fifty-dollar setup fee. Transfer an existing HSA or open a new one today: The Bitcoin Layer is proud to be sponsored by Club Orange. One of the best parts of bitcoin is the people, and some of the strongest friendships and opportunities come from meeting other bitcoiners. Club Orange makes that easy. Whether you're at home or traveling for a conference, you can find local bitcoiners, discover the next meetup, and locate merchants that accept bitcoin, all in one app. Every city has an incredible bitcoin community; you just need a way to find it. Learn more at or download Club Orange on the App Store or Google Play. When you join, send Nik a DM. Timestamps: 00:00 A shocking development: Coldcard cold storage being swept 01:14 Is this a bitcoin protocol problem or a company problem 02:00 How bitcoin private keys and addresses are generated 03:56 Generating a first address with bitaddress.org and entropy 06:19 Seed phrases, BIP39, and why the words are just a number 07:30 The Coldcard default seed generation that got exploited 08:36 Where the vulnerability goes away: dice rolls and passphrases 11:00 Who is affected, and what to do right now 12:30 Why Nik favors diversified storage 14:51 Are bitcoin ETF holders at risk 17:01 A call to action and a message to those affected 20:36 The Foundation sponsorship and Nik's Coldcard backstory 23:00 Why cold storage by itself is not enough 📊 The Bitcoin Layer is a bitcoin and global macroeconomic research firm. ▶️