Post quantum cryptography is not fundamentally that hard, the only issues are the signatures are bigger (so the chain is less efficient), and migration of existing chains (biggest problem).
replyQuantum computers might harm BTC or some other chains if the devs can’t get their house in order soon enough, but there’s no reason to think it fundamentally alters whether cryptocurrency is mathematically viable
Migration for certain prominent projects is already underway, e.g Ethereum.
replyIt's too late.
replyHow are you going to mass migrate all of the cold, dark wallets?
It's not going to happen because it requires conscious, deliberate, careful migration on the part of the wallet owners. You won't even be able to contact or warn most of them, let alone get them to understand the process.
Probably half the value in Ethereum and Bitcoin will be popped this way.