Demand and supply of US dollars for trade in Oil is miniscule compared to the demand and supply of US dollars for merchandise and investment.
Oil represents about 2% of the daily transactions in US dollars, so the article's premise is bogus.
These doom and alarm stories surface here every so often. The idea that the Russians, Iranians, or whoever is the villain du jour, would crash the entire world economy for the sake of poking the US in the eye is a ridiculous fantasy, even if it could be done.
This is especially so given the shaky state of the Euro, which has likely already seen its high-water mark VS the dollar, at least for the foreseeable future.
I have no clue where you got that number.
My knowledge tells me it is less than 1%.
Anyway, this article is bogus.