If USD was to go away tomorrow how would you know how much a Bitcoin is worth?
Euros, Yuan, gold, rubles?I think the OP was referring to an increase in Bitcoin's value, not the dollar's collapse, although both are probably inevitable to some degree.
What if there was no more gold or silver or fiat money, How would you determine Bitcoins value then?
I think this won't happen. There can't be no gold or silver.
The only way is that one "person" holds all the gold i.e. together and won't share it. Maybe Bitcoin will be an established currency but I don't think it will replace other currencies. Maybe the fiat like USD / EUR. But then you have a value between gold / silver / coins and Bitcoins
Greetings