Gold and silver would and should operate separately. Silver is necessary in the mix for “small change” to preclude the resort to paper.
Like how the federal government once made a one-oz gold coin worth 20 one-oz silver dollars? It was madness. Sure, mindless bureaucrats can declare by fiat that the ratio has to be one to 20, but the open free market can (and has) put it at one to a hundred. Metals are raw commodities with wildly fluctuating market values and what we need is money that keeps prices stable.