Coinbase Outlines Bitcoin Quantum Options, Leaves Legacy Funds Unresolved

Coinbase has outlined technical options for preparing Bitcoin (BTC) for post-quantum security, including address and signature changes, while leaving policy for older funds open to discussion. Coinbase presents the material as input to an open discussion, not a settled design or timetable. It recommends treating address structure and signing method as separate choices: an address holds funds, while a signature demonstrates control and authorizes spending. BIP-360, also called P2MR, and P2TRv2 are among the address approaches. BIP-360 would need further work to support post-quantum signatures.