Coinbase Builds Post-Quantum Bitcoin Custody Playbook

The significance here is less about quantum timelines than about custody design: Coinbase is positioning itself to absorb a future Bitcoin protocol change without forcing clients to migrate keys, which matters for institutions holding large balances. The open question is whether flexibility can survive once Bitcoin actually picks a signing standard, since a custody architecture built to be agnostic may still require re-engineering at the point of network consensus. Watch whether other custodians follow with similar contingency frameworks, or whether this remains a Coinbase-specific hedge.