I'll keep it short(ish) and simple:
Trump is being used (and probably allowed to profit himself) to #PumpAndDump1 with the US economy. Their method for this fraud is tariffs.
The people who know what products or which countries are going to be targeted are getting rich when the markets go down2, and when the markets go up3.
We're can be outraged all we want, but we need to do is get even. This is fraud on the largest scale ever seen.
1 it is really more Dump (announce tarrifs) and Pump, but that's not normally what happens. https://en.wikipedia.org/wiki/Pump_and_dump
2 Using what is called "shorting" https://en.wikipedia.org/wiki/Short_(finance)
3 So simple a scheme, it is a platitude https://en.wiktionary.org/wiki/buy_low,_sell_high