[Coin](https://onlycoin.com/?referral=CDlvyyu4) is such a great idea and the site is really nicely done (as is the video). (that link has a referrer code; click [here](https://onlycoin.com/) if you don't want me to get a referral discount) ---- I'm actually more interested in it replacing non-credit/debit cards as I have more of those than credit/debit cards. That said, a lot of those cards are never swiped so maybe it won't be of much use there other than a fancy way of storing my frequent flyer numbers in a device :-) ---- This thing will likely be a card skimmers dream. I could almost pretend I'm scanning someone's card with my Square reader but it really be my Coin reader. ---- I worry merchants would reject my Coin, not just because of fraud suspicions but just because they don't know what the hell it is. ---- But it's just such a cool concept, I'm almost willing to spend $50 (minus any referrals—hint, hint) just to have one. ---- Some people are complaining that Coin doesn't support chip cards. Not much of an issue for me. ----

Coin - because what I want is to replace all my payment tokens with a Single Point Of Failure that has a battery to charge.

— Kevin Marks (@kevinmarks) November 14, 2013

@kevinmarks There's no battery to charge, lasts 2 years, then trash.

— Sean Bonner â“‹ (@seanbonner) November 14, 2013
---- One referral discount so far. Thank you! ---- What's to stop the merchant pressing the button when they take your Coin and switching the card used? ---- In an email to people who have ordered Coins, a few questions have been answered: > * You will be able to reactivate your Coin even if your phone is dead by tapping in a "Morse-code-like" password using the button > * Coin will track how many times your card is being swiped and tell you if someone is using it when it isn't near you > * Coin can "auto-lock" based on proximity such that you can swipe, but cannot change the card that is selected -- so a waiter or waitress can't accidentally switch your payment method when you pay your bill