That would make sense if his tweets weren't consistent with what is known and observed about Trump's personality, and if some of his tweets didn't do more harm than good to his own administration, party and agenda. And he doesn't need to make an effort to stay in the news - he's the President, so the news will cover him no matter what.

Honestly, I think he's just a troll, nothing more complex than that. They don't represent what Trump will actually do but I'm certain they do represent what he thinks, and what he wants to do.