> Economic crashes are hard to predict.

Some of them are, some of them aren't. An economic crash is pretty much guaranteed if international relations break down in such a way that international partners believe trading with the US is a liability. Dollar going down won't stimulate exports if the cause for it was an aversion to buying US products in the first place.

Whether or when that will happen, and to which extent, is another story, all we can say is that the momentum created by the current US administration moves us closer to that point. Will they come to their mind before that happen? Will they be able to restore trust? Will the lingering effect from the damage already done subside? These are hard questions.