In the past this has been a sustainable theory. Growth in the physical world through railroads or petroleum were much slower and far less directly tied to a sin

In the past this has been a sustainable theory. Growth in the physical world through railroads or petroleum were much slower and far less directly tied to a single person. So from the perspective of investors it seems like a reasonable argument. What we're seeing for the first time with Twitter, Facebook, and Snapchat is the maximum size that physics allows.