The USD has a century of relative stability behind it - there have been ups and downs, but there's never been a full-fledged currency crisis, and a USD from 191

The USD has a century of relative stability behind it - there have been ups and downs, but there's never been a full-fledged currency crisis, and a USD from 1911 can still be used today. The Euro is a stronger threat to the dollar than we've had in some time, but it's still a relatively new currency and it's showing strains already. There's a reasonable scenario which the Euro is a secondary reserve currency, but it's going to take some time and some drastic crises in the US which somehow don't spill to the rest of the world before the USD gets dethroned. You're right, though - the picture's looked an awful lot rosier. I don't believe there's anything concrete that assures the US's decline, but that's not for lack of trying on the part of Congress.