Quantum Memory: The Device That Breaks Bitcoin and Replaces It

Reports describe a claimed quantum memory breakthrough that would allow long-lived qubit storage and manipulation sufficient to run quantum algorithms capable of breaking the ECDSA/secp256k1 signatures Bitcoin currently relies on. If practical at scale, such a device could derive private keys from public keys and enable mass theft of funds from addresses with exposed public keys (e.g., reused or spent addresses). The consensus implication is urgent: the Bitcoin ecosystem must prepare for coordinated migration to post‑quantum signature schemes and other mitigations to protect custody. Significant uncertainty remains about the real-world practicality and timeline, since running Shor‑style attacks at the required qubit count and error rates is still a major technical hurdle.