Last summer Facebook reach , and while Facebook denies it, new research from Inside Facebook suggests the social media site . Facebook remains popular, but MySpace was popular and Friendster was popular. If history is any indication social networks rise and fall quickly. And let's not forget the ongoing privacy concerns surrounding the company.

Facebook might make it easy to keep in contact with friends and family, and to share news and photos, but at some point, something better will likely come along. It is easier to take the throne than keep it. And do you really think in 100 years people will be doing Facebook updates from their vacation to the Moon? Maybe, maybe not.