For me if only Satoshi Nakamoto is a well-known personality then its matters but if he is an ordinary citizen with great mind, I don’t think there is an impact to it. The price will be greatly boost high if he is like Bill Gates or many othe like him because of its influence in the world. But if not it will be a suicidal attempt for him, the CIA will investigate him and all concern financial enthusiast will look for anything bad on his life that they can use to stop bitcoin.
I will never believe that Satoshi Nakamoto is one person. Such a global project is not under force to one person. It is possible that the concept of cryptocurrency was invented by one person, but to implement and Finance such a project can only be a group of programmers with a very large support of the financial magnates. That's why the whales managed to buy up all the coins before their price increase.