those coins have never moved, nobody knows the public keys, only hashes. that's infeasible even for qc.
why people still repeat this nonsense?
(not to mention, that there is always an option of a so...
even is Satoshis coins didn't move other big wallets did or can do it. SF locking coins that don't upgrade can be seen as confiscation. Either way banks don't have any of these issues, they will upgrade first and your bank account is not on a public ledger.
