TheStreet's Jim Cramer calls Facebook "a money machine." Facebook is a stock that is running and running and is generating huge amounts of cash. People are asking why it isn't going up even more. Cramer says that Facebook is an earnings per share story. He thinks it could earn $3 in 2016 and deserves a 30 multiple bringing the stock to $90. Cramer also says Facebook has about 50% longer term growth during that period. Even if the stock goes down a little bit, Cramer tells investors they need to buy it. Facebook has become a core holding for money managers not unlike Google and Apple. Facebook isn't a revenue story, it is a cash machine with very good leverage and great operating margins. Cramer says to own Facebook.