The discussion about quantum computing threatening Bitcoin is heating up again. The core issue isn't 'if,' but 'when.' 1.7 million early BTC could be the first to bear the brunt due to address structure issues, leaving the community with a dilemma: freeze the assets or let them be stolen. A more realistic problem is that even if we start quantum-resistant upgrades now, it could take years to go from technical solutions to community consensus and finally complete the migration. Meanwhile, other public chains have already started defense drills on testnets and account layers.