Zuckerburg took people by the short ones.
Don't worry, sell now (or short if you are brave, or short millions of it if you control a big fund), and buy back at $5 in 12 months.You will never have the luck of Zuckerburg, but you can still make some small money to enrich your life. Remember it's a two-way street. What goes up too much will have to come way down.
This wasn't a public offering it was a public fleecing.