If Satoshi Nakamoto reveals his real identity, it will be a big shock to the entire world and to the crypto ecosystem at large. This will bring a rise of fear or FUD, and the market will be filled with FOMO. This FOMO is that of not letting all portfolio crash to Zero.
Nakamoto will have his life endangered if he expose his real identity. As he will be hunter down by government, so will the Bitcoin haters go after him, and there will probably be some huge bounty placed on him.
It is possible he can unlock his Treasury and still keep his identify hidden, cause if he is alive today and has being carrying out normal day to day activities, he will have an identity that people knows him by. It will just be for him to unlock his Treasury and use his current identity, except his is no more in existence.
If he is alive and exposes his identity, it will really affect the market and the crypto community on a very large scale. It could be positive or negative effect.