Not true. If you want to see that idea of economic policy fail, look at Turkey under Erdogan:
https://en.wikipedia.org/wiki/Turkish_currency_and_debt_cris...
The reason that Erdogan couldn't pull off this con for as long as the US is that he can't print Dollars or Euros. However, even those "reserve currencies" eventually can lose investor faith. You're just speculating that they never will.