Sign me up for the giveaway
This link says there is already something backed by gold and silver.
https://www.gldtalk.org/index.php?topic=2179.0Quote
A new digital currency backed by gold and silver is attracting wide spread attention on the internet. Traded on the Ripple Network, this next generation cryptocurrency released by NoFiatCoin | XNF is the first coin in the digital currency market to be backed by precious metals. The coin was released on the 6th of January and saw its value rise almost 50% to $2.10 in just one week.