"At the very least, we can say bitcoin is not a currency."
Legally speaking in Japan...
Wow... that's news !! (sarcastic)
If you have followed all statements around the world of every Central Bank: then they all say: it's not a currency (just because by law there is only one currency which has to be accepted by every one in that country).
But nearly every country also has laws that other means of payment may be accepted (Barter systems are very Legal) if both parties agree... and in this context falls Bitcoin, and is why it cannot be banned by existing Laws, in those specific countries.
