You bring up a good point. DoD recently has been looking for both a way in and resistance to "Q day".
As for bitcoin, it's not ECDSA alone, but even sha256 becomes more vulnerable. ⚰️
On the plus side, there's work right now in building out [zk stark proof]https://www.techopedia.com/definition/zero-knowledge-stark-zkstark) used by zerosync. But that would also require a full state proof implementation for bitcoin. Something that is likely away from realization by at least a decade. 🫠