Lots of IMF documents even talk about using their SDR as a global currency, even as far back as 2010. Describes how in a situation of a global financial catastrophe they would distribute SDR's to each nation's fiat based on "weighted" evaluation of their economy. Now look at Evergrande, that could be the trigger that brings down the whole world's financial system, and the IMF will be ready to step in for the rescue. As of 2015 IMF already considers China's economy surpassing the U.S. China would get more SDR's as they have all the manufacturing, labor, and exports. The U.S. would be evaluated as a weak economy. To be honest, I think they will digitalize it all and then back it by gold. That's how they will entice everyone to use it. They know the integrity of the fractional reserve system is completely gone, and confidence is already lost. They will use gold to entice people into the new digital system where they can see every financial transaction and tax the hell out of everything. Then all the political enemies will simply be remotely cut off from making transactions. Nixon didn't just cut the dollar off of the gold standard, he replaced it with the oil standard - ie the "Petrodollar." That's why Saudi Arabia alliance has been critical to the survival of the U.S. Dollar up until now. But now that's all over, and the world is already starting to trade oil in other denominations than the USD. The game is already up, we just haven't watched it manifest yet.