How the $89M Cold Wallet Hack Reconstructed Bitcoin Seed Phrases

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How nearly $89 million in Bitcoin was reportedly stolenWhy more than 4,500 addresses may have been affectedHow weak randomness can expose a recovery phraseHow attackers can test possible seeds against the blockchainWhy the physical wallet never needed to be touchedWhether Coldcard and its security reviewers should have found the defectWhich devices and firmware versions may be vulnerableWhat affected owners should do immediatelyWhy a completely new seed phrase is requiredWhat this means for hardware-wallet security and self-custody