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TLDR On-chain analyses tie a legacy Coldcard firmware entropy flaw to thefts of roughly1,080- 2,055 BTC from thousands of wallets, triggering urgent migrations and security alerts. Deep Dive.... Researchers from Galaxy Research, Chainalysis and others traced coordinated sweeps starting around July30 to a bug in older Coldcard firmware that weakened seed entropy. The flaw replaced Coldcard's hardware random number generator with a predictable software fallback, cutting effective randomness and letting attackers brute-force seeds offline. Multiple attack waves have drained between about1,080 BTC and a likely ceiling near2,055 BTC, with estimates of5,200-7,700 vulnerable addresses. Coinkite has shipped patched firmware and urged users to regenerate seeds and move funds, while exchanges and ETFS report increased inflows as some self-custody holders relocate BTC. #BTC