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>> bret: the bit coin roller coaster continues to be on a wild ride. it hit a new record price yesterday and nose dived today. this is what bit coin is and why it is so volatile. >> bit coin launched in 2009 when many people lost faith in government support financial system. bit coin is a digital currency. there is no government guaranteeing and no central bank printing it. its a peer to peer software system that mimics cash in the physical world. every bit coin is updated across every participa...