Yes and no. I'm no expert, but there's two things that don't make it nearly as dangerous as it is for BTC.

The first is the fact that many things are centralized. Things like Signal already have quantum-resistant encryption, and if they don't, they're able to implement it relatively quickly because it's centralized. BTC is not centralized and needs to jump through a bunch of hoops to get anything done.

The second is that because those things are centralized or close to, you can roll back changes with ease. For instance, if you hack a bank and steal a bunch of money from an account you're far more likely to be able to freeze those funds and get other banks to help stop everything before they're gone forever. You can't do that with BTC.