I'm a huge fan of CryptoCurrencies, and BitCoin in particular. Although I would like to shove every penny I can manage to save into something like BitCoin, I am worried about the advent of Quantum Computers.

From what I've researched about these things, it seems possible that in a few years from now, they might be used to hack/crack/corrupt anything Crypto or BlockChain-related.

My question is basically: Is it possible to crash BitCoin and all other CryptoCurrencies using something Quantum Computers?

What's the reality regarding this scenario sketch?