Well, zuckerberg is probably annoyed he dropped a place in the rich list so now he's "learning about cryptocurrency"
he once wore a tie for a whole year.... that's how serious it was.
He wore a tie for a Whole Year!
can't get more serious than that.
A more likely blockchain route for facebook would be to tokenise usage so that the monkeys become the moderators to earn a break from adverts or to get shiny badges. That way they can "outsource" the moderation to the users. Next step would be to use something like substratum or one of the other distributed internet platforms to have users host facebook data as well.
Web 3.0, you're still the product but now you host the site, moderate the site and create the content and for some reason you're still being showered with adverts and subjected to social experimentation.