Other than crime the only other use-case I've seen for crypto is for getting money into Russia because the sanctions mean my English teacher friend in Vladivostok can't use normal banks to accept payments for the online distance teaching thing he does. But I could oversimplify this to "bypassing international sanctions" which might be a crime? Crypto mainly seems to be useful to people who can't or won't use normal banks, and those people are mostly criminals. People in Russia prefer bitcoin over rubles (even before the sanctions) but that's more an indictment of the ruble than an endorsement of bitcoin.

What am I missing here? What are the cool things bitcoin does that something like visa cannot? I've read Satoshi's paper and Vitalik Buterin's book. I want crypto to work, and I'm really searching hard for a problem crypto solves for which we don't already have a better solution.