Quote from: gentlemand on October 07, 2019, 04:59:41 PM

Quote from: qubitasic on October 07, 2019, 04:52:02 PM

Banks can freeze accounts, rewind, correct it.

And then the quantum owner does it again and again. The whole global economy would rapidly become a smoking ruin. Bitcoin would be the least of anyone's concern.

Quantum-resistant cryptography already exists, so banks and other centralized institutions are in a much better position to recover.

With Bitcoin, we have much bigger problems. Simply switching to quantum-resistant signatures doesn't solve the issue because we can't force people to move their bitcoins to safe addresses. Something like 1/3 of the circulating supply is at risk -- quite possibly more -- due to key reuse, xpub sharing, pay-to-pubkey mining, etc. If a QC attacked Bitcoin in the wild, it would irreparably destroy faith in the currency based on that alone. I don't believe the same is true for banks.