strictly defined, electronic payments and cash payments of the same denomination are the same currency, since they are nominally equivalent, but i'm going to po

strictly defined, electronic payments and cash payments of the same denomination are the same currency, since they are nominally equivalent, but i'm going to posit that they're diverging and will functionally become two different currencies as the proliferation of electronic payments and easy/cheap credit continues. i think when a good or service can be sold for different prices ("cash discount"), it's going in that direction.