Bitcoin Developers Propose Freezing Vulnerable Coins to Counter Quantum Threats

The promise of Bitcoin has always been that users have full control over their coins, but this is now being challenged by developers seeking to build defenses against future quantum computers. A recently updated proposal, Bitcoin Improvement Proposal (BIP)-361, suggests forcing holders to migrate their coins to new quantum-resistant addresses or risk having them frozen permanently. This move is in response to warnings that a sufficiently powerful quantum machine could compromise the Bitcoin blockchain, with some predicting a 'quantum deadline' of 2029. The proposal has sparked backlash within the community, with some arguing it goes against the fundamental principle of sovereign control over funds. The plan involves a three-phase migration, starting with blocking new bitcoin from being sent to old-style addresses, followed by rendering old signatures invalid, and finally, a potential rescue phase using zero-knowledge proofs. While developers see this as a defensive measure, many users are concerned about the implications of freezing coins and the potential for central planning.