Earlier quoted context omitted.
I agree with you. I don't even think in the near future there will be a single global reserve currency. There will be multiple ones, all of which weaker in terms of power and influence than the dollar.
Do you even need singular global currency in modern world? Where every transaction can be in essence instant if there was desire. And everything is digital. Overall it is rather different world and things can be done different than before.
The world doesn't need it, but unless Americans want to see their purchasing power destroyed, they do.