Because when other social networks have stopped growing, they have massively shrunk as the next big thing has come along. Of course, it's very possible that th

Because when other social networks have stopped growing, they have massively shrunk as the next big thing has come along. Of course, it's very possible that that argument is mixing up cause and effect, and this is still a relatively young field. But the implication is that, if facebook isn't relevant to pretty much everyone, then it will eventually be eaten up by something that is.