The Winklevoss twins famously lost out to Mark Zuckerberg in a battle for the fortune generated by Facebook but they did walk away with millions of dollars. Where they put that money is a story of its own. It's detailed in the new book "Bitcoin Billionaires" by author Ben Mezrich, who also wrote the book on which "The Social Network" was based. Mezrick joins "CBS This Morning: Saturday" to discuss the twin brothers' successful venture into cryptocurrency.

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