Simply said, what China bans in this notice does not exists in any country yet. As far as I know no bank is using bitcoin as a currency in all over the world. Even Germany treats it as a private currency. China just officially announced it. On the other hand, previously exchanges are in gray area but now they have chance to be 'white'.
But didn't China ban it as a currency too? In that case probably the main purpose of bitcoin is void. I'm not saying that's the case but that's what I heard. Banning the banks is moot, who cares? But banning the currency aspect of bitcoin is really not cool.
nothing is 100% clear most of this is probably google translations. However I don't believe it is banned as a currency.