The only thing Satoshi Nakamoto should do now is what his being doing at its best which is,
To stay or remain anonymous
Yes.. I totally agree with you. Because the only way bitcoin can remain decentralized, and free from government policies affecting it's value is equally the anonymity of it's founder Satoshi Nakamoto, which has already been done.
Because only had he been known, I bet you, you would have been hearing several countless number of court cases issue by both Federal, state and other bodies sueing Satoshi to court just like Mark Zuckerberg the founder of Facebook and Instagram.