I have two gold coins that are 2 1/2 dollar Indian heads from 1911 and 1913. They are some of the favorite coins in my coin collection, like a bitcoin they go up in value regardless of what the price of gold is doing because of demand from other collectors. But these days this seems like there's less and less gold coin collectors and people that are more interested in digital currency. Is there a digital currency that's a back by real physical gold and silver? @briandenver