Comment Re:purely from a business perspective. (Score 1) 38
Quantum computing is not a threat to bitcoin mining since it is a SHA-256 process and there's no known QC algorithm that threatens it. Even assuming your claim that QC could mine all of the remaining bitcoin quickly (it can't), the scarcity of the 21 million coin limit is coded into the protocol. QC doesn't have the capacity to change the protocol.
Quantum computing IS a threat to public key cryptography because there's a known algorithm to derive the private key from a public key. This isn't a problem for most bitcoin on the blockchain because they are mostly hashed public keys. However, in the very early days it was common to send bitcoin directly to a non-hashed public key which exposes those coins to QC. Anyone having coins in those addresses will have to move them to protect against the QC threat.