Google says future quantum computers could crack BTC private keys in 9 minutes, but I always feel like it's a bit of an intentional attempt to create anxiety.

Why?
1. If quantum computing truly reaches that level, the first to be paralyzed wouldn't be Bitcoin, but banking systems, credit cards, and national secrets.
By then, whether your fiat currency still exists will be a question.
2. Such technology can't be used casually.
Governments are not fools. Anything capable of breaking bank security or nuclear codes will be tightly sealed and controlled. It won't be used recklessly everywhere.
At least Bitcoin has one advantage: it's open source and can be upgraded.
As CZ said, migrating to post-quantum encryption algorithms is technically feasible.
The hard part is decentralized coordination, not whether it can be solved.
What really should be worried about are those "dead projects" with no maintenance. But mainstream cryptocurrencies are likely to survive.
So, don't panic and sell off because of some news. The crypto industry has developed this far because of solid technical support.
#谷歌量子AI警示加密安全