594 BTC Moved from 500 Single-Sig Addresses in 25 Minutes

Approximately $38M in BTC was consolidated from 500 dormant single-signature addresses within 25 minutes. Coldcard denies device-wide flaws, citing potential seed compromise or weak keys as the likely cause.

Woofun AI reports that approximately 594 BTC were transferred from 500 single-signature addresses within a 25-minute window on Thursday, with the funds subsequently consolidated into a separate wallet. The affected holdings contained balances ranging from 0.15 to 0.26 BTC, many of which had remained dormant for years. Early speculation linked the incident to Coldcard devices, but CEO NVK denied any device-wide vulnerability, suggesting users may have imported previously compromised or weak seeds. Jameson Lopp noted that one victim lost only a portion of their UTXOs, indicating potential exposure of individual private keys rather than full seed compromise. No evidence currently points to a Coldcard RNG flaw, supply chain issue, or Bitcoin cryptography failure.