Satoshi's word on this issue.
P.S. A gradual weakening of a hash function is the much more likely scenario, not breaking all at once. The warning signs typically come years in advance. Plenty of time for Bitcoin Core to make a clean transition.
Discussion
We will probably move over to sha-512 algorithm if and when this happens
Or blake3 that'd be my pick.
But absolutely there's no reason to rationally expect SHA-256 will suddenly break, there will be plenty of time to transition to a new hash function.
Interesting that the bitcoin founder and devs were discussing this back in 2010.
Just thinking if quantum computing breaks #btc there will be a lot of other things broken as well, like basically all private secure communication and financial transactions etc.
To think I would ever be discussion the implications of Schrödinger’s wave equation sends shivers up my spine. That’s one college book I am glad I will never open again.
1000% if this did happen it would break absolutely fucking everything and tradfi would be a much bigger target