They already did,dollar is no longer a gold standerd(used to be until 1970 i believe) now dollar acts like gold ie reserve currency and gold value and dollare value has inverse relation. i am not expert on monetary poicy or those hi fi stuffs but less advance economies tends to value gold more than in advance economies. alot of good side holding gold as the wealth perservation against hyperinflation or if more frequent fluctation on currency value.