5. Startup: Pinterest

What it does: Pinterest, as you might have already read, is one of the most popular social networks today(in fact it stands at #3, next to Facebook and Twitter)

How much it’s valued at: currently $27 million, but investors are planning to pump in money and bring it up to $1 billion. A report on Business Insider said it could easily be $5 billion.

Tech Giant that could buy it: (Well, actually, it could be worth more than $5 billion to) Google or Amazon