You can only ask 1 Question to Satoshi Nakamoto what would you ask him, her or they? and why?
Good question... what I would ask him is the obvious one (I think):
Are you OK with the blocksize growing so big that only corporation can run full nodes? Isn't this directly opposite to the concept of "cash"' What solutions do you propose to scale bitcoin without centralizing the network?
I think that would be it. Scaling Bitcoin is the most relevant topic. I guess I would also ask about mining but thats 2 questions.