Digital currency refers to the digitization of money. Digitization is not equal to scanning. It's like a digital signature. Digital signature is not scanning your signature into a digital image, or obtaining your signature with a touch screen, let alone your signature. Digital currency is often mistaken for virtual currency. But virtual currency refers to unreal currency. For example, when you play Three Kingdoms (games) or go sailing, you have money, and that money is virtual. Of course, those virtual currencies will also have their real value. For example, if you buy her/his account from another player, you can get all the virtual assets of that player, and then it will be much easier for you to continue playing. Virtual currency is not necessarily digital. For example, children play games with pebbles as virtual currency.