How long until China overtakes the USA as the world's largest economy?

It never will as we will stop their monetary currency manipulation by printing fiat money to the extent that inflates our dollar so much the bonds they hold of ours will be worthless. At least I hope our Treasury department has the guts to do this but under tax cheat Gheitner, it probably won't as he has no cajones except when it comes to income tax evasion.