Besides the US, there are 16 nations with AAA ratings. Pick one that is not using the euro:
UK, canada, new zealand, australia, isle of man, denmark, sweden, norway, and singapore...all are AAA rated and do not use the euro
the obvious alternative to the US dollar in my opinion would be for the former british colonies(sans USA) to use a common currency. Maybe call it the new pound.
But the rest of the world is leaning towards using what they are calling the SDR or special drawing rights.
Cavuto showed that the US is now with Belgium on terms of credit.
Read up on those SDR’s. I think it will be more related to a debit type card that is set up on a barter system for everyone. Only the extremely rich will have actual denominational assets.