Is Satoshi Nakamoto really the founder of bitcoin? Then why he did not show in public? What do you think the reason maybe? He might be a billionaire by now if he showed his true identity in public.
He is the founder of Bitcoin, and he likely won't show in public because he is the creator of a $10b value currency, and this means a lot of people would want to get their hands on him for one reason or another. Might be political, might be criminal.
He might be a billionaire, but a ton of governments would want to get him, and criminal orgs would equally want him. If he says nothing that is best for him, plain and simple.