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Coldcard losses pass $70M as Coinkite expands warning to newer devicesThe Coldcard (@COLDCARDwallet) exploit has grown far beyond first estimates, with over 1,080 bitcoin:native worth more than $70M drained from nearly 1,200 wallets, per Galaxy Research and engineers at Block.@Coinkite confirmed the cause: a 2021 firmware bug that swapped the hardware random number generator for a weak software fallback, leaving seeds open to brute force. Affected: Mk3 on 4.0.1–4.1.9, Mk4/Mk5 below 5.6.0, and Q below 1.5.0Q ...