I am more than positive that there are no evident reasons for gold and paper money to satisfy economical needs of the digital era. Their time has gone. All our cards we use bear virtual info. In previous societies cattle, grain, skulls, salt …were recognized as a system of exchange … just imagine how many elephant tusks or how much tobacco you possess on your card! There is no time to wait: Crypto Currency was born, it’s a toddler… that will be a personality pretty soon. I bet)))