One of the reason for high trust on bitcoin is that the bitcoin owner Satoshi identity is hidden. If all of sudden Satoshi come in the public and his identity is revealed, do you think it will have a bad impact on the bitcoin price and it can dump? Or do you think that bitcoin price will pump on this revelation? Mind you that i am talking about the real satoshi, not the fake ones claiming themselves to be satoshi.
Bitcoin might turn from a decentralized coin into a centralized one if Satoshi comes out of nowhere. Another thing is we don't know if Satoshi is still alive until now.With regards to price, since there is a chance that it might change into a centralized coin there might be a huge impact to its price but we don't know if it will be a positive or a negative one by I think more of a negative one. My opinion only though.
After all, I think its best for the real creator of Bitcoin to just stay hidden and unidentified because that would be better for him in terms of security as well as his life (since he is holding a million Bitcoins).
If the person turns out to be someone like Craig wright...
If Faketoshi can prove that he really is Satoshi, I might sell all of my Bitcoin holdings 
. JK