nor Dollar or any other Currency will come to an end, because for Bitcoins their should be some currency to convert, if not their is no value for bitcoins. Only the Dollar fluctuation gives the strength to Bitcoins, because who ever wants to keep or invest in Bitcoins on the end of the Day he/she wants to convert Bitcoins to their Country currency.
This is complete nonsense. If all fiat currencies, and not only fiat currencies, if all other forms of value like metals died tomorrow, dissapeared, and only Bitcoin existed, then the price of Bitcoin would be made from an average of what people is paying for in terms of goods and services. The thing is, this is an absolute non sense scenareo because I don't see fiat currencies disappearing let alone metals.