Trump ran and won as a populist. Will he try to govern that way? Who knows, but he will be a plutocrat presiding over a party almost wholly owned by plutocrats, so the temptation will be to throw his supporters a few racist bones while handing out big tax cuts to himself and friends. Trump may well not be a billionaire today, but I expect he will get a lot richer fast.
Another big question is how much energy he will expend on punishing and humiliating his enemies.
Another thing I worry about is when Putin will decide the time is right to gobble up the Baltics.