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.
Bitcoin cannot be considered a private currency in any way, if only because the person who created it or invented it has not been directly identified. Satoshi Nakamoto was not found either in Japan or in another state, and therefore no one has the right to claim its authorship.
Bitcoin can be considered a private currency only in the sense that, in all likelihood, it will be used primarily by private individuals, rather than legal entities.
Exactly, and that is how the private currency can be considered as private if there's a huge group of people are using it and not by the community. In fact blockchain is not a private ledger so therefore we can't call it as private if the people using blockchain could have been trace using that transaction ID.