Willow quantum chip demonstrates verifiable quantum advantage on hardware

Cryptocurrencies would be the last thing I worry about w.r.t Quantum crypto attacks. Everything would be broken. Think banks, brokerage accounts, email, text messages - everything.

In HTTPS for example, the server and client must agree on how to communicate, and we’ve already had to deprecate older, now-insecure cryptography standards. More options get added, and old ones will have to be deprecated. This isn’t a new thing, just maybe some cryptographic schemes will get rotated out earlier than expected.

that's not really the issue, the real interesting part is existing encrypted information that three letter agencies likely have dutifully stored in a vault and that's going to become readable. A lot of that communication was made under the assumption that it's secure.