[rmc]

In my mind, that's the big gamble with Facebook. It could either be THE source for socializing for 100 years (and hence very valuable), or it could be another MySpace (etc.), and hence not worth a lot.

The cynic in me, would say that people who own stock now don't think it would last and are getting out when it's at it's top.

[philwelch]

Not even the entire Bell system would be worth $1 trillion today, and unlike Facebook, people actually had to use the Bell system, it wasn't just a source of idle entertainment.