I have no doubts about the fact that the Dollar will win from the Bitcoin because the bitcoin is still too small and the Dollar is way to big to get defeated.
What people also are saying is true the bitcoin is a sort of depending on it.
bitcoin is not depending on anything else.
it is a stand alone money without the need to any other currency.
the fact that its price is measured in USD or any other fiat for that matter is only because we need something to measure it with. nothing else.
In a sense that is correct, Bitcoin is not depending on fiat. But price of most products or services sold in bitcoin is adjust according to the fiat currency specifically USD.
No one sells something for fixed 1 btc when price of bitcoin falls or rises. they will the the bitcoin amount accordingly, so in other way bitcoin is dependent on fiat currency