In a paper published by Science Direct, researchers Neil Gandal, JT Hamrick, Tyler Moore, and Tali Oberman outline their belief that the USD/BTC exchange rate rose from $150 to $1000 - though the actions of a single person over a 60 day period.The abstract summary of their finding reads:They claim two trading bots did the footwork, named in their paper "Markus" and "Willey" - making fake trades and driving up the price, all while the owner of Mt.Gox was covering up that they had been hackedmaking concealment of their activity especially easy.You can read their full research paper-------