People and nations will diversify away from the dollar into a basket of precious metals, global foreign currencies (Yuan, Yen, Australian Dollar, Canadian Dollar, British Pound, Euros, Swiss Francs), hard assets (real estate), and alternative investments, such as BitCoin.
Outside the US, demand for the dollar will decrease which will work to the advantage of US exports, if anyone buys them.
The largest dollar-denominated American export has been Federal Debt instruments.