Citron's Left is short Facebook - CNBC "Facebook is losing an extensive amount of relevancy," Left said in a phone interview Monday morning. "I am short Facebook."
LinkedIn "was a monopoly in their respective space, whereas I see Facebook losing share to Snapchat and overstaying its welcome in other niches," Left said. "I am not saying Facebook is a 'bad company' (it) just will not be a $330 billion company in a year."