Finally, someone who respects the spirit of Christmas. Drug dealers want to stay home with their families too!
There's plenty of uses for blockchains, but it's almost all about document validation and contract non-repudiation (boring bureaucratic things), not so much for commodities ("currency") and copyright enforcement (NFTs).
There are uses for 'blockchain' based systems, for instance git uses what is effectively a blockchain to store commits. The big difference is, rather than using proof-of-work or proof-of-funds to maintain consistently, if you break the upstream repository 'Mad' Dave over there, who is trying to push his changes before the weekend will beat you with an Ethernet cable until you regret your ways.
I've got one and only one, its a synonym for cryptocurrency in conversations and writing.
Are drugs a use case? Cause I'm pretty sure it's just for drugs