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Bitcoin exchange Mt. Gox sued in federal court in Chicago

Mt. Gox CEO Mark Karpeles speaks press conference Justice Ministry Tokyo Friday night Feb. 28 2014. The Mt. Gox bitcoexchange

Mt. Gox CEO Mark Karpeles speaks at a press conference at the Justice Ministry in Tokyo Friday night, Feb. 28, 2014. The Mt. Gox bitcoin exchange in Tokyo filed for bankruptcy protection, acknowledging that a significant amount of the virtual currency had gone missing. Karpeles appeared before Japanese TV news cameras Friday, bowing deeply for several minutes. He said a weakness in the exchange's systems was behind the massive loss of the virtual currency. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT

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Updated: April 2, 2014 6:09AM



Mt. Gox — the embattled Japanese virtual currency exchange — is being sued in Chicago’s federal court by a customer who hopes his lawsuit will be granted class-action status.

Gregory Greene, who lives in the north suburbs, says he lost bitcoins worth $25,000 when Mt. Gox, until recently the world’s largest bitcoin exchange, collapsed.

Mt. Gox admitted earlier this week that weaknesses in it systems meant 850,000 bitcoins, worth an estimated $425 million, had gone missing from its exchange. It filed for bankruptcy Friday.

Bitcoins were introduced in 2009 as a way to facilitate international trade without involving banks, incurring fees or government oversight. In recent months, speculators sent their value soaring.

But Mt. Gox’s admission that huge sums may have been stolen from its exchange is a setback to the currency’s image and is likely to prompt multiple lawsuits.

Greene’s suit, filed late Thursday, states that the “catastrophic loss has not only revealed the instability of a burgeoning new industry, it has also uncovered a massive scheme to defraud millions of consumers into providing a private company with real, paper money in exchange for virtual currency.”

It alleges Mt. Gox didn’t provide the security customers including Greene paid it for.

Email: kjanssen@suntimes.com

Twitter: @kimjnews



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