Exactly. He thinks he knows better than the experts. He thinks lower interest rates are good and people saying they should be higher are just trying to make him look bad. Nothing he does is a clever gambit.
This model makes the most sense to me. If you just model it as: Trump wants to do things that make Trump look good, everything he's done fits into it quite nicely. If you want to predict his next move, think to yourself, what does Trump think will make him look the best to his adoring supporters?
Logically, conquering Greenland makes zero sense and is only damaging to the United States. But to his supporters, it will make Trump look powerful and good. Which is why he's talking about it, and why I think there's a decent chance that he's going to do it. I just hope there are enough sensible people left in his idiocracy cabinet to stop him.