If you have a Central Bank that is engaged in political ends (sanctions), then there is already discouragement from using the currency for international exchanges. If you have a poor bonds salesman in high office (someone pursuing America First policies), then you're going to further dissuade people from using the currency.
And even though you could potentially enforce the use of currency through the barrel end of a gun, if enough nations rebel then it's a moot point.
The problem with the US is that it has the Bretton Woods agreement and does not spend within its means in which to pursue the military industrial complex which has become exactly what Eisenhower warned the American people about. The United States is not engaged in profitable enterprises through security and defense alone and has bled out trillions of dollars in adventures in the Middle East with little to show for it.
I am in agreement with the original poster in that the US dollar and the Central Bank are on borrowed time, and the focus should be on what this nation's best course of action should be after the fact.