The history of reserve currencies suggests a ~100 year arc of dominance, and the US is at the end of that line.
https://azizonomics.com/2012/01/04/a-history-of-reserve-curr...
https://azizonomics.com/2012/01/04/a-history-of-reserve-curr...
You’re extrapolating from a 200-year history with N=2.
Culturally, no. Americans would consider it an attack on their sovereignty.
It would be a tough sell in anything like the current political climate.