[javert]

This article is interesting and helpful. So, thanks.

That said, I'm not 100% convinced. If we stop trading oil in dollars, doesn't that reduce the need for countries to keep dollars in reserve? It could be the beginning of a slippery slope.

[notahacker]

The amount of dollars kept in reserve to trade oil with certain petroleum exporters is a tiny proportion of total dollars in circulation

What is useful is having quadrillions of dollars of other payment obligations denominated in dollars, from the IRS to mortgage debt to IMF loans to international financial markets to people paying cash rent in Ecuador, and a central bank that can raise interest rates if it believes the demand for dollars is falling.

Sterling is still valuable, despite the fact it stopped being the main global reserve currency decades ago and the UK doesn't have any real ability to invade people to change that.