Fascism and dictatorships are not good for business. International trading partners won’t want anything to do with businesses located in the United States if this happens. A democracy provides a trustable and reassuring legal framework to ensure stability of contracts. International complaints are not going to be upheld under a Trump government.
This is why everyone knows you don’t do business with China.
Although if you have to have a dictator I suppose Donald Trump is probably the best dictator since he and his staff are regularly outwit by squirrels and things found growing under stones.