>The one use case I have seen for blockchain that is real is that cryptocurrency is great for moving money around the world when governments or banks maybe don't want you to do so.

No it isn't. You don't need blockchains to create illegal banks and exchanges or to launder money. All of that was around for a long time before blockchains. You could even create those things "as a service" without blockchains, it would be just as shady and illegal. I'm serious here, there is absolutely no practical value to blockchains whatsoever.