One of the odd things about occidental folks generally is they tend to spend a bunch of time contemplating the future and thus not living in the present. One description of oriental (Chinese I think) thought is how a river looks when only looking down stream or how the voyage of a ship appears when merely looking at the wake from the stern.
Fact is BTCs are a currency now or, at least fit the definition of "currency" better than FRN (so called "USD").
I have lured a friend who sells batteries/electronics online to get into BTCs and he will soon be offering his wares in exchange for BTC.
The future is already here.