Well stated, AC.
I would add that it's a folly to dismiss Trump as stupid. He's "used car salesman" smart. There are a lot of interesting and effective negotiation tactics that are available when you can throw ethics and long-term credibility out of consideration. Trump has not only read but written Sun-Tzu Art-of-War style treatises on business dealings... how to portray yourself as rich when you are poor, stupid when you are shrewd, slow when you're moving fast. If you can't dazzle them with brilliance, then baffle them with bullshit sort of stuff.
Some story I've heard quoted offhand (wish I could find the source) was about when he bought a yacht from someone. He had a minion go and thank the other guy's minions for selling it to him for a much larger price than he actually paid. The idea was to spread rumors that made it look like Trump was much richer than he actually was, and much more foolhardy with his money than he actually was, so other people would make mistakes negotiating with him later. This tactic plays well with a lot of the other numbers and statistics he makes up on the spot... he exaggerates everything he can, in order to make himself look better later. He made up that huge $4 billion figure for the Boeing Air Force One projects, so he can brag about saving a billion dollars later when it comes out closer to a more realistic figure. I think I've seen an article indicating he's already done this.
Everything else he's been doing indicates that he's clearing the tables to maximize leverage for new negotiations -- firing all US ambassadors on day 1, threatening sky-high import/export tariffs, putting gag orders and hiring freezes on all US government agencies. It's clear that to do anything, you'll have to suck up to Trump first, and bring money and favors to secure it. But this is a standard business negotiation tactic, pull every string you can towards you first and make everyone else fight and bargain to get back the slack.
So we can look forwards to some short term "wins". Hopefully we can keep him negotiating and dealing with our enemies, and our friends will be very understanding in the mean time.