Bitcoin Developers Propose 'Wait and React' Strategy to Counter Quantum Computing Threats

A new proposal is being discussed among Bitcoin developers, suggesting a significant shift in how the network responds to potential quantum computing threats. Instead of imposing a pre-scheduled freeze on vulnerable coins, the 'wait and react' strategy would only trigger a network-wide restriction if a quantum-capable attacker is detected. This approach is based on a 'canary' system, which involves placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker. If the address is accessed, it would serve as public proof that the threat is real and automatically trigger a network-wide freeze of older wallets. The proposal also includes a financial incentive, allowing users to contribute to a bounty that rewards the first entity to demonstrate a quantum attack publicly. However, this approach relies on the assumption that the first entity capable of breaking Bitcoin's security would claim the bounty rather than attempting a large-scale theft. This bet goes against the network's design principles, which prioritize security and decentralization. If the bet fails, Bitcoin may face the worst of both worlds: a catastrophic attack and the realization that a fixed-timeline defense could have prevented it.