Coinbase, which holds 5% of all bitcoin, wants the quantum fix started now
Summary
Coinbase says Bitcoin should begin preparing now for a possible future quantum-computing threat, since network upgrades and user migration could take years. It recommends flexible transaction formats that can support post-quantum signatures, staged adoption of hybrid signatures, support for both stateful and stateless schemes, robust implementations, and compatibility with multi-party computation used by custodians. Coinbase also advises addressing the fate of dormant or unupgraded funds separately from developing protections, so that debate does not delay upgrades. No quantum computer capable of breaking Bitcoin’s current signatures exists today; the threat remains prospective.
