Not everyone believed in Facebook. The company, which turns 10 years old Feb. 4, has blossomed into one of the most famous and frequented websites in the world. What started out as a social online tool for college kids transformed into a mass network that connects more than 500 million people around the world today.
However, it hasn't been a smooth journey.
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Over the years, quite a few notable naysayers have doubted the company's longevity and impact. From billionaire buffs like Warren Buffett to the site's own founder and CEO, Mark Zuckerberg, here are eight people who have doubted the future of Facebook at one time or another.