Perhaps, although I can't see the point in damaging the American economy or currency. More likely, he's only talking to his proctologist and posting what they decide.

Throwing away 80+ years of mostly-Republican soft power and foreign policy seems foolish. Making it difficult to ship or sell to the US only makes sense if they want to detach from the world's economic system. They're welcome to try to be Tibet, but folks might find it difficult to get what they want. And losing the reserve-currency status for the USD will hurt. So will being unable to (easily) sell debt.

I'm guessing you meant Bhutan — Tibet is/occupied/governed by China.