Uncertainty ain't good for business
I keep hearing that what a great strategy it is to keep the world on edge, by threats and giant sweeping insults (list here of anything he said relevant to anything outside the US, aside from Congo, which nobody knows what it is).
It is mafia style operation which is good for no one other than for the mafia in the short term. In the long term it leads to generations living in fear, massive exodus, and endless tragedies. Which already started with the slashing of USAID.