IRS Says Bitcoin Is Property
"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."So if the coffee shop leaves the "property" as bitcoins instead of converting it over to dollars, and the value of those bitcoins falls before cashing-out, they're stuck paying tax on the $2 worth of income despite potentially no-longer having the funds to cover those taxes.