Satoshi Nakamoto is the one who created bitcoin, until now we don't know if who really he is. But we appreciate him that what he did to help people to give a chance to invest and earn in bitcoin. Just think of that he was the genius person, because he could create bitcoin in order to help lot of people in all over the country. I think its possible that someday he introduced his self to the people, maybe he is one person only.
It's a Japan scientist and computer science professor as far as I read from some rumor articles. And he's hiding his identity as usual, because some bad people would try to kidnap him most possibly.
Satoshi Nakamoto is the founder of bitcoin and he hides his identity i don't really know why but if he didn't exist then bitcoin would probably never have existed and a lot of people wouldn't get rich. I think in a few years he will reveal his identity and have a speech or something i think.