Why is BlackRock so concerned about Bitcoin's code, but not at all worried about the money sitting in their bank accounts? Both BTC private keys and fiat account access are protected by the same class of cryptographic algorithms.
If I had a quantum computer, I’d start by cracking bank accounts — simply because that’s where the bigger money is.

For me, it's because any compromised private keys immediately result in irreversible loss, unlike bank accounts that have institutional safeguards like fraud detection and legal recourse.
So for sure, if you are a criminal, maybe you may have a high chance of not getting caught using cryptocurrencies like Bitcoin and at the same time having difficulty to success too.