If every country could come up with a way to personally annoy him (refuse to give away their largest territory, build taller buildings all around his hotels, call him a silly name, etc.) all the tariffs would essentially cancel each other out. If everything’s tariffed, nothing’s tariffed.
I’m admittedly not a genius when it comes to foreign exchange/international currency dynamics, but unless the Yuan became the reserve currency I think it would be a positive change for most of the world.