Yes, trust and stability .Do I sleep better at night with a bag...

Yes, trust and stability .
Do I sleep better at night with a bag of US dollars under my pillow , or smorgasbord of roubles , rupees and renminbis ?
US dollar a bit longer . I agree
Maybe worth revisiting the question in a few decades.
The last time I looked , gold and ''encrypted currency '' , always seem to be priced in US dollars and need to be converted to them to do anything useful.

disclosure: I think US dollar domination is bad for the world. But Brics is not capable of providing the solution.