A big difference between the past social sites and Facebook is that Facebook is now able to buy the up and coming competitors. Even in 2008 it had enough money

A big difference between the past social sites and Facebook is that Facebook is now able to buy the up and coming competitors. Even in 2008 it had enough money to absorb competitors. At this point it has even more power. Additionally their user base is broad. Even if one sector decides to stop using the site there's still a big base that will keep site going until it can recover the base. Additionally, Zuckerberg is a super smart CEO and is able to correct problems that would cause it to fail. I think short of getting the govertments of the world to shut it down Facebook is here to stay.