Pornhub's premium service already uses crypto and has since the credit card monopolies threw them out in 2020. I just checked - the only other way to pay is by ACH.

If porn is the bellwether, then use cases have arrived.

Or more likely, crypto has found yet another morally repugnant use.

The CC companies withdrew from PornHub because their business model was paying for the production of child pornography.

Crypto pops up its ugly head yet again. Not a coincidence given the other "killer apps" are extortion, money laundering and greater fool farming.