Coin is a startup that has built a prototype of a card that it claims can store all of your credit, debit and loyalty card information on one Coin card that can then be used to pay at any point of sale system.
To load the Coin card, one has to connect a dongle to the smartphone and swipe whatever credit, debit and loyalty cards that contain a stripe and are swipeable. Then to pay, one has to press a button on the front of the card and flip through the different card choices. The electronic display shows the card information so that you and the cashier know which card you’re using. 😎