THE ELECTION OF 2029

So the united state of america thinks it doesn't need anybody else, that it is self-sufficient- needing no outside help in satisfying one's basic needs, and can do whatsoever it wants right or wrong.
If the world had a plan-B it would be to tell the americans if they don't behave themselves the entire world will drop the US dollar as the worlds currency and join brics!
If I was a leader of a country it is what I would do, tell the USA if you put tariffs on my country I will drop the usa dollar and join brics, think about it world?