Not sure what he is up to. But people are saying that he bought doge coins for himself. He realized that he can control the doge market. Hence, he is now trying to make as much profit as he can. I doubt that. Maybe he is serious? Who knows... His recent tweet was about him working with doge developers to improve the overall system. Now if this is true, it means he really is into doge and wants to turn this meme coin into something very useful. Or he is just manipulating the market and trying to get all the profit which I once again seriously doubt. Lets just wait and see what happens next.
I do not believe that to be true. I mean he definitely did buy some doge that is for sure, because he likes it, but the reason why he hypes it is not because he bought some, it is because he gets attention and that is will always be there. He always used twitter that way, tweets like "today is 69 days after 4/20 lol" has always been his thing, he loves to act insane on twitter and get attention for some reason.
I do not know why he would do that, I do not know why he needs that, some psychologist could study his behaviors and can pinpoint what seems to be the reason but my money is on his father never giving him any attention at all which is why he is seeking love from other people all around the world and doge opened a door for that. I do not have any other reason honestly, but I think it is purely about all the attention he is getting.