There are nearly 7 billion people in the world that do not use USD. Does this mean that the USD will soon be worthless? Probably so.
I would wager most people on this planet use USD. Every day. Indirectly. Did they use any crude oil derived products? Cook corn? Bake bread? Eat tofu? All are priced directly in USD for the whole planet or tied strongly to US markets as market makers.
All prices in are in USD for 3% of the world population. Sure, the commodity indexes are mostly gauged in USD for now, but they are traded in local currencies. China in fact, only pegs the yuan to the dollar as a convenience, but will not for much longer. Euros have long since drifted from the USD. I realize this is a very complex economic issue, but remember "past performance does not predict future results." The USD can go the way of the Confederate dollar.