Elon Musk is an entrepreneur, what he tells or does is meant to help his business grow and not promote others. He meant nothing with his tweet, it was a troll.
I am sure he is not Satoshi 😀
There are many conspiracy theories in this market, until now we don't know who Satoshi is, so anyone here could be him. It is impossible to be sure of anything until everything is clear. And I agree with you, Elon Musk is not the reason for the current market increase, his tweet is just a troll because he has done so many times before for this market.