> Say things are wildly successful and people come to expect that merchants will be taking a pic of your credit card with their phone. So you easily hand over y

> Say things are wildly successful and people come to expect that merchants will be taking a pic of your credit card with their phone. So you easily hand over your card to some random person to take a pic of it - assuming they are using Card.io. When you're sitting in a restaurant and hand over your credit card, the waiter is now in total posssesion of it. They could take a picture of it. They could go to their laptop and make purchases from China. They could run out the backdoor and never return it. Handing over your credit card is a common enough thing, because you are protected from fraud by the credit card companies policies---not by your own regard for if the person you're giving your card is trust worthy or not.