Facebook IPO is the "Exit" for Mark and Facebook?

Hi,

Nowadays everybody is talking about Bubble 2.0 especially after Instagram acquisition. And the rumors of this acquisition related to Facebook IPO.

And here comes the Facebook IPO. People are asking whether or not it is really worth 100 billion dollars, or if you would buy Facebook stock, for how long Facebook's popularity will last, etc.

Since most of the people agrees on Instagram does not worth 1 billion dollars, i started to think that the IPO is the exit strategy for Mark Zuckerberg. Maybe not for the moment, but in the near future...

Like all popular things, eventually Facebook will also be beaten by another popular service.