The controversial cryptocurrency Bitcoin has been making news around the world lately. The collapse of Mt. Gox -- one of the largest Bitcoin exchanges in the world -- and the attempt to uncover the man who created the virtual currency have nearly made Bitcoin a household name. But what exactly is Bitcoin? Duke University Fuqua School of Business (http://www.fuqua.duke.edu/) finance professor Campbell Harvey (http://www.fuqua.duke.edu/faculty_research/faculty_directory/harvey/) explains.
