This logic seems dumb, Facebook is a big company, if you're joining Facebook now, even as a star hire, are they really going to throw enough equity at you to make you a millionaire in some unknown future IPO? And you have no idea when the IPO will happen, it could be 10 years before you can liquidate. And you might get screwed over on some dilution or the strike price or something currently undisclosed, private companies are notoriously secretive about their financials.

It's just too many unknowns. I don't think it makes sense to plan your life around hitting this options jackpot.