Bitcoin bubble warnings issued as futures trading opens in Chicago
(The Guardian Business News)

First contract on a regulated exchange is seen as step towards legitimacy for the cryptocurrency but volume traded is tinyBitcoin has taken a step toward legitimacy with the launch of a product on a Chicago exchange that allows investors to take bets on its price in the future.The new contract on the Chicago Board Options Exchange came as the digital currency jumped another 10%, sparking fresh warnings of a speculative bubble after last week´s 40% climb in price. Continue reading...