I think the dollar will lower a bit in the future but we will see what is gonna happen.
I will hold bitcoin and the bitcoin is the future. I will use both bitcoin and dollar, but the dollar has no future.
No mate dollar is powerful and it will always be powerful in future too, I don't see bitcoin replacing dollar sooner or latter, bitcoin is still in its initial stage and it needs strong reason to replace dollar.
Dollar can't be replaced soon, but bitcoin has reached most of the countries with its highest value, although its only seven years from its existence. So in future dollar won't be replaced but will be used equal to dollar.