It's actually more accurate to say that the price of oil is tied to the dollar (petrodollar). As the dollar weakens (the last two administrations have worked to weaken the dollar for balance of trade reasons) the price of oil goes up to offset it. This is in addition to other forces on the price of oil.
As we devalue the dollar it will become a more and more attractive option. Governments are likely going to try to ban it (they don't like competition) so that does put it into question.