None of this is news to anyone who was paying attention in the 80s. He's always, at best, been nothing more than a carnival barker. "President Trump" used to be the punchline of jokes.
Most of his fortune comes from selling his name - lots of "Trump" properties aren't owned by him, the developers just paid him a licensing fee to put his name on them.
His business sense otherwise is...well, he went bankrupt running casinos, and that industry is a license to print money. He's a marketing genius - as evidenced by him trading on his last name to make several billion dollars and to win a presidential election with people knowing he was a clown. But otherwise, he's pretty pathetic.