According to an interpretation of the ruling, you would have to pay, if the value of the Bitcoin you bought (presumably with USD) went up from when you bought i

According to an interpretation of the ruling, you would have to pay, if the value of the Bitcoin you bought (presumably with USD) went up from when you bought it to when you used it to purchase a good: "Under the ruling, purchasing a $2 cup of coffee with bitcoins bought for $1 would trigger $1 in capital gains for the coffee drinker and $2 of income for the coffee shop." http://www.npr.org/blogs/thetwo-way/2014/03/25/294364892/irs-says-it-will-treat-bitcoins-as-property-not-currency http://www.npr.org/blogs/thetwo-way/2014/03/25/294364892/irs...