Mark Zuckerberg has stated that Facebook's biggest challenge is transitioning to mobile, as people access the Internet more and more on mobile devices. The main problem is that advertising is far more difficult on such a platform, although Internet advertising is far from a lucrative business generally.
If there's one thing we learned from the Facebook IPO it's this: Don't buy the hype. Eric warned investors to Forget Facebook and told them about the Tech IPO They Should Be Buying instead. If you missed his call the first time, it's not too late. This company has room to soar.