Facebook is not going away. They can turn on as many revenue streams as they want, and people will not leave.
The only certainty is change.
Hardware is much more important than software. Low level software (like operating systems) is much more important than web applications or services.
Very true, which is why you should trade regularly. Strictly speaking, you can't win unless you play. In the long run, everything dies, so you have to ask yourself: is $FB a good bet for the next year? next 2 years? next five years?
You're better off randomly selecting a bunch of investments and sitting on them.
On the flip side, myspace/aol/etc are still in use.
Things that large don't stop on a dime. I do think facebook is hitting a slowing period, the growth days are long behind them. It's only a matter of time until something new sweeps everyone away. Once that happens it will be the new myspace. Where advertisers don't care to market as much. It won't die but it will become less important, and eventually become irrelevant. FBs push notification campaign shows how they are trying to stay relevant.