I hope you know that if you put in an order for when it is released you will end up buying it after 1m other people have bought it. You may put in an order for the stock @100 but you will end up buying it for 150 and then it may crash. Wait a few weeks/months before investing.
Haha you're going to lose a shit ton of your money, or make no money at all and break even. FB can't go any further in profit, especially with users only clicking a 0.051% of the time, whereas Google has a 0.4% CTR. This will only lessen in time, and their ability to utilise ads in their mobile platform has not shown desirable either.