XP - experience points. It's team is a bunch of anonymous cartoons, no whitepaper or any sort of technical discussion, it's github is a fork with a few changes committed by a developer working on another coin just a few months back, and it's worth >$800 million apparently.
At this point we should just consider creating ScamCoin and watch its market cap soar
It's one of the better ones imo. It's used for a social cause and unlike many other coins, you can actually buy things with it.