When was the last time you paid cash for something? Even though a few vendors still prefer cash, I know I use my credit card for almost everything I buy these days — that is, if I’m not using PayPal or my phone! Virtual money is just so much easier to use. Now bitcoin is the new up-and-coming denomination of value which exists only in virtual form – and, just like gold, but unlike online gaming currency, it’s inherently scarce.