If the dollar was backed by something of inherent value again, it would at least have tangible value being pegged to something real and valuable.
Having some sort of asset backing to the currency is a separate issue from demand for the dollar as the international currency.
The Swiss Franc was partially backed by gold until 2001(?) but it wasn’t the international currency even with that advantage.
you are talking about going back to the gold standard?
Right now there is roughly $2.26 trillion in US currency in circulation worldwide - physical (about 10%) and bank fiat currencies etc.
There isn’t enough gold in existence for the USA to go back to the gold standard.
If you have a gold standard, then the money supply can only expand in line with the gold supply. That means limited money, so money does indeed retain its value better (= less inflation). However, without the ability to create money, it’s hard for an economy to expand. Imagine going to the bank for a mortgage and being told, “sorry, we haven’t discovered any new gold mines this year so we don’t have any money to lend you.”
You can’t go back to a physical standard for currency any more than you can cancel all paper currency and keep it in specie