Well obviously no one knows... or very few people know (I still think that there are a couple original bitcoiners on this forum who are 99% sure that they know who Satoshi is).
Whats your favourite theory?
Mine is that it was John Nash

Please provide some proof for your theories. Would love to look into them!
There is one theory that i found it interested. Satoshi Nakamoto is not human, it is an AI.

i dont have any proofs, but some where i read this theory and some peoples can prove it.
Some said that satoshi nakamoto is not a japanese people because he can use english language very fluent.