Coinbase Tells Bitcoin Developers Quantum-Resistant Upgrade Must Work for Big Custodians

Coinbase is staking out a position as a custodian whose scale makes it a de facto stakeholder in Bitcoin's technical roadmap, which is unusual in a protocol where development has historically been driven by independent contributors. The emphasis on signing risks for large holders points to a real split: post-quantum schemes that suit individual users may not suit institutions holding coins on behalf of others. The open question is whether this input shapes consensus or is treated as one voice among many.