sending money to family in countries with harsher financial systems, being able to donate to causes you support without it being traceable to you (through tornado cash and zcash/monero), being able to move large amounts of money instantly with minimal fees and no intervention, etc.
Yeah, the one and only crypto use case: go around financial regulations.
Ever wonder why we want to trace transactions? KYC, AML, all that jazz?
Hint: darkness and obscurity most of the time don't hide shy virtuous people.
What is the widespread problem crypto is solving ?