In the 1960s, French politician Valéry d’Estaing complained that the United States enjoyed an “exorbitant privilege” due to the dollar’s status as the world’s reserve currency. He had a point.
Because the dollar is the world’s currency, the US can borrow cheaper than it could otherwise (lower interest rates), US banks and companies can conveniently do cross-border business using their own currency, and when there is geopolitical tension, central banks and investors buy US Treasuries, keeping the dollar high and the United States insulated from the conflict. A government that borrows in a foreign currency can go bankrupt; not so when it borrows from abroad in its own currency ie. through foreign purchases of US Treasury bills….CLICK for complete article