1. Why is Satoshi Nakamoto hiding???
A: He wants bitcoin to be centralized and not about him
B: he is dead
There's no C
2 .
Can Satoshi Nakamoto ever shut down Bitcoin?
Even if he would be alive, how could he do it when govenrments can't do it. Even if someone came out from hiding and sign the message as him, bitcoin is standing on its own. People also probably change their views about Satoshi and stopped glorifying him/her/them, because no one could live up to expectations people have of him.
All lies.