I think bitcoin is a world currency not a private currency and because he does not hold by the government and does not have tax.. and i am agreed for this currency. so all people are wrong tell us bitcoin is a private currency.
I think it's right that bitcoin is not a private currency, if anyone says that bitcoin as a personal currency is a big mistake, because bitcoin is used in all countries in the world.
there are some countries that can accept and use bitcoin for payment, but there are also countries that have not received it or even rejected it for reasons.