Facebook launched in 04 and grew quickly. Then as now, people were saying it was dead, that Twitter would overtake it, that they would run out of money, that they would be the next Friendster, MySpace, AOL. It hasn't happened. They're closing in on 500 million (yes half a billion people use it!), and still there are nonbelievers.

My not so witty prediction is Facebook will IPO and probably fetch a 200 billion valuation in 2 years and yet still the naysayers will persist, like flies in China. Some things never change.