He is easy to control, because he reacts predictably. All those missiles he sent into Syria, based on evidence that was shown later to be fake, was a prime example.

Also, he is not a multi billionaire, or wasn't before the presidency, I'm not sure now. He had many billions of dollars in debt, but that doesn't make someone a multi billionaire. It was one of the things that he always lied about. We know he lied about it because a reporter in the UK did a report detailing how it was a lie. Trump sued him for libel, slander, and a host of other things, but lost his lawsuit because everything in the article was verified to be true.