This could be a rumor to promote this Coin. 80k Bitcoin moved sure but it's not tied to any new protocol as you mentioned or any symbolic launch. Also there is no verified sign of him returning. We saw a lot's of rumors previously satoshi getting back. Probably this one also a rumors. We can't be sure untill it's proven or verified. Remember more than rumors some big fish laid their eye's on Satoshi to capture him.

I saw recently lot's of user's beliving him on Reddit s by claiming that only satoshi could explain something so complex. Untill we know for sure don't put all faith on it. Deal it like a rumors