The human mind is such it makes even the foremost acceptable facts seem unacceptable. Brains are only susceptible to the acceptance of the old. Rare is that the intellect that accepts the new and therefore the novel. Coins and paper money are in use almost since, well not since dinosaurs and stone aged men clubbing women stone cold on their heads for wives, but a minimum of since humanity became an intelligent species, so to mention the smallest amount. Eternal bliss of electronic wizardry to the rescue of the ultimate frontiers of human development. Wired digital magic, you'll prefer to label it. But as mind-boggling, because it could seem, word has it that within the not thus far future, World paper money could very likely get replaced by electronic-digital cryptocurrency.  

Even the very thought of such an idea would appear astounding and rather unacceptable to the human mind. On the other hand, so were two unheard brothers who glided by Orville and Wright's name and their unbelievable machine that has made travel across the World's oceans, but a mere silky smooth pillow to rest and awaken to. 

Far easier, numerous and fewer complex are the ways to form payments in today's bill based society. Give it whatever name you would like, MasterCard, open-end credit, computerized payments, wire transfers; these are nothing new. They need been there since the new modern-day marble and limestone age. The times when humans began to rule over their mighty artificial concrete jungles looming large everywhere the earth Earth, or rather the illusion of what's left of it. At this very moment, approximately 85% of non-cash funds are converted to digital money everywhere in the World. The days of paper money are numbered. It is the wheels of progress at work.