Venezuela's "Petro" cryptocurrency looks like it may be the world's first country-wide "beta test" of a non-Fiat, commodity backed digital currency...
source https://www.google.com/url?rct=j&sa=t&url=https://www.zerohedge.com/news/2018-10-06/post-fiat-world-begins-venezuelas-cryptocurrency-necessity-obtain-passport&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFUFmMRYNzANSITxgFhShugcFQZJg
