It’s somewhat ironic that the people I know who are into crypto are somewhat more likely to use cash than your average person for privacy reasons...
No one needs to have a full record of every purchase I make in real time.
I wonder if the criminal use case has not been reduced that much by crypto, as I imagine cold hard cash that's acceptable anywhere globally is preferable. Crypto may be good for some transactions, but cash will be king for a long time yet.