Probably not for 20-40 years, if then. And there are quantum secure signatures, NIST standardized SLH-DSA last year. Bitcoin can add over time, as the evaluation continues and be quantum ready, long before cryptographically relevant quantum computers arrive.
[@adam3us — November 15, 2025, responding to a question about whether Bitcoin is at risk from advancing quantum research]
[Back reframed the quantum threat as a solvable engineering problem with a multi-decade runway. Bitcoin Improvement Proposal 360 (BIP-360), drafted by Jameson Lopp, outlines a gradual transition to post-quantum-resistant outputs using NIST-standardized algorithms. As of 2025, the highest-capacity quantum systems remain far below the threshold needed to run Shor’s algorithm against Bitcoin’s elliptic curve signatures.]