Wallets suck. Seriously. Mine hurts my butt when I sit down. I have to remember to take it with me, and then I’m always afraid of losing it. There’s nothing fun about it. And…well…it’s dirty. It really is—money is dirty, and the cards you hand to people with dirty hands that handle dirty cards all day are dirty. Can we please just use our mobiles as wallets?
http://robertsiciliano.com/blog/2013/11/05/i-really-want-my-phone-to-be-my-wallet-dont-you/