Nobody can ignore the reality that we are in a digital society today. We buy most of stuff online paid by mobile banks. Some people really believe the physical money will disappear in the future, while others have the opposite opinion. From my view, I totally agree that the physical money will no longer be used in the future unless the electricity disappear. I believe nobody can disagree that 100% businesses can exchange their deals with digital money, no matter business -to-business, or business-to-consumers, even between two individuals.