The Dollar is the world reserve currency because the market wanted it to be the reserve currency.
Personally, if remaining the reserve currency requires America to continue shipping millions of jobs to Korea & China,
I say let the Korean & Chinese have it.
BTW, nobody in their right mind would ever want to make international deals in either one of their currencies.
The most important problem facing the US is the loss of jobs. Our kids graduate and cannot find work.
What should be done about the loss of high value manufacturing to the Far East -
and specifically to our greatest enemy -- China.
Take care of that problem -- the other problems will be de minimis.