Coinbase urges immediate start of Bitcoin quantum migration citing multi-year timeline

Coinbase, which custodies roughly 5% of all Bitcoin, urged developers to begin preparing for the quantum threat now, warning that consensus changes and ecosystem migrations can take years. The exchange outlined technical requirements including a flexible "container" design like BIP-360, a staged "1-of-2" classical-plus-quantum spending path, and compatibility with MPC key-splitting, stressing that waiting for a cryptographically relevant quantum computer would leave insufficient time to respond.