Here's a prediction:

The stock market tanks at the end of his term around reelection time. What he used to boast will be used as a sign of how poor of a job he did. The economy will be declared in a recession, ushering in the exact opposite of what trump is: BERNIE SANDERS.

We'll slowly enter into a socialist hell which will kill the economy and cause mass inflation.

Kind of an extreme prediction and not too likely, but I would definitely be microwaving the popcorn if it did happen.