It seems likely, given the state of world financial affairs, that China will reveal its true gold reserves in 2015 at the IMF meeting. Clearly, they have been unimpressed with American currency debasement since at least 2009 and stopped buying bonds back in 2010.
Given the situation with Russia over eastern Ukraine, and the sanctions aimed at crippling the Russian financial system, and the fact the Russia and China have a certain alliance in the currency war with the United States, it also seems possible that the dollar will face severe pressure in the coming months or year.
How long this will take to play out is impossible to know at this time. My suspicion is time will run out for the dollar in the next 2 years, but a reserve currency sometimes lingers longer than one expects.