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(Antana / Flickr)

The Chicago Futures Exchange is set to start trading bitcoin, which has seen its value rise more than 1,000 percent since the start of the year. Just what is bitcoin?

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(BTC Keychain / Flickr)

With the debut of the city's first Bitcoin ATM, and a Bitcoin demo taking place on Capitol Hill, many are wondering if virtual currency is making its way to becoming mainstream, and whether it has the potential to replace paper currency.

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(BTC Keychain / Flickr)

What is a Bitcoin? Where do they come from and how are they used? And why are more and more governments taking a careful look at this first-ever cyber currency?