A large portion of USD's worth is from it being the primary currency in trading oil, the "Petrodollar". If countries switch to a different currency, that will h

A large portion of USD's worth is from it being the primary currency in trading oil, the "Petrodollar". If countries switch to a different currency, that will hurt USD. Then again, Libya's president Gaddafi was working on gold-for-oil trade, and then he was overthrown and killed by US-backed rebels.