He could be playing or joking, but there's a high chance that he's holding an amount of crypto so he's taking advantage of this popularity to hype these coins.
I don't think so. If he was, he would definitely share I think. He was having fun with DOGE from a very long time but that unknown reason obviously. You can see that he only doing such shill for DOGE. No other coins although he changed his bio into bitcoin for some days a few days ago.