We don't know what's actually he meant to move to other things, but I think the longer he hanging around, it will increase the possibility someone might able to leak his information and find out who're actually Satoshi is.
All the news and speculations resurfacing on the internet are all old news, nothing new has been said since.
Now my question is this, if actually Satoshi Nakamoto saw a good vision of what Bitcoin will turn out to be in the future, why then did he decided to move on to other things instead of focusing more on the Bitcoin project to make sure that he also took part in achieving the adoption of this digital currency?
“I have moved on to other things” does not carry any meaning - it does not tell us if what he has moved on to is related to crypto or not. His intentions might be different from what he wrote and just as you said it’s unfortunate that he’s not here to answer the question himself - all that will be said will just be based on personal opinion which might be totally wrong from the original intent.