As long as there is demand - there is a proposal, and with each year the demand increases. In fact, we are already trying to introduce a waiver of paper money, using internet banks, electronic payments and credit cards for payments in stores/shops/. But the states of some countries still struggle for the introduction of electronic money, not to mention the crypto currency, because many shops have the ability to take only cash, until now. Big BTC plus is its unique algorithm that generates a new one, so it can not be faked as paper. At least for this day no one understood how to do it.  

Crypto currency will replace cash not soon, until the authorities come up with a way to introduce taxes, regulate the law, etc.