Bitcoin Developer Proposes Collateral Requirement to Deter Quantum Attacks

This is less a technical fix than an economic one: instead of trying to outrun quantum computing, the proposal shifts the fight to game theory, making an attack costly enough that it may not be worth mounting. It matters most for holders of old, exposed wallets who currently have no recourse, and for developers weighing whether deterrence can substitute for migration. The open question is whether an attacker would ever be bound by a collateral rule it has no incentive to respect — and whether this stays a thought experiment or gains traction in Bitcoin's rough consensus process.