To estimate the number of owners of bitcoins is not just difficult, but impossible in principle. This is based on the basic characteristics of the crypto currency as such: decentralization, lack of control over state regulators and, what is important in our case, anonymity. It is anonymity that does not allow us to obtain correct statistical data. The number of registered bitcoin-purses also does not help, since one person can have their unlimited number. The only estimate that can be given is this: if today all the bitcoins are divided equally, each inhabitant of the Earth will get about 0.002 bitecoins.