The Winklevii are back, and this time they're not talking about Facebook.
Cameron and Tyler Winklevoss -- the Harvard twins who have argued for years that Mark Zuckerberg stole the idea for Facebook from them -- this week told the New York Times that they had massive holdings, at one point valued at $11 million, in virtual currency Bitcoin.
The public backing by two widely recognized players in the tech world, combined with Bitcoin's soaring -- and now crashing -- value, has forced the secretive digital money into the spotlight.
Bitcoin is known as the world's first decentralized digital currency and was created four years ago by someone (or possibly more than one person) known by the pseudonym Satoshi Nakamoto. Owners can buy and sell the currency, transfer it to others via the Internet and use it to buy digital and physical goods (although that is still in the early stages).