> Even then, if I win, the money is going to be pointless as US dollar will tank hard.

You could always short the dollar, I guess?

I suspect Trump's policies will tank the dollar and thereby cause a swing against the Republicans larger than the most likely novice attempts by anyone in the US attempting to interfere with the election.

I don't think "being a dictatorship" will, by itself, put off investors. Only actual economic harm will do that.