> I'm not here to do your homework.
That's funny, I thought you were here trying to argue that cryptocurrency has a legitimate purpose. I guess being asked for a single example to back that up is too much.
Instead you just imply that because I disagree with you that I am uninformed. Good luck with that, you won't convince anyone.
Look at the top 50 tokens, read their whitepapers, connect with the communities, try a few apps and make up your own mind. You may very will still come to the conclusion that it's worthless, but at least you'd then have an informed opinion.
It's actually a fun thing to do, this exploration. Even if you dislike it. It's intellectually stimulating.