Satoshi Nakamoto is the name used by the unknown person or persons who designed bitcoin and created its original reference implementation. He was the father of Bitoin. Maybe the reason why he hide his identity is to protect itself from other because internet now can easily hack some maybe he was trying to hide himself so that hackers can not know its identity or information about him that can use to steal bitcoin. We know that in digital currency can easily hack by expert hackers because it uses internet to work. It is also possible that it was a community but i am pretty sure that he was a person.