I don't think bitcoin is usable as a currency (because of the scarcity mainly) but if we had to judge every potential currency by whether institutionnal actors accept it we might never accept anythig as currency until the end of the world.
I would think of a currency as anything that has recognized value while being transferable.
Let's imagine starbucks prepaid point card get's accepted in some drugstore also, the. Some super markets, gas station, theaters, airports. It really explodes and you can start paying with them at millions of stores, and you are allowed to exchange them with other people via some procedure. The starbucks point system becomes a currency IMO. You'll never pay your taxes with it, but you can use them for exchange and commerce purpose.
I would think of a currency as anything that has recognized value while being transferable.
Let's imagine starbucks prepaid point card get's accepted in some drugstore also, the. Some super markets, gas station, theaters, airports. It really explodes and you can start paying with them at millions of stores, and you are allowed to exchange them with other people via some procedure. The starbucks point system becomes a currency IMO. You'll never pay your taxes with it, but you can use them for exchange and commerce purpose.