I am seeing different profiles having hats on their profile, even I want to grab one. Does it need special privileges, more points ?
You need to achieve any one of the actions as listed here to wear the hats.
Stack Exchange invites you to celebrate the end of a great year …with HATS! As you use your site, you'll discover hats and other items hidden behind certain actions. Collect all of them, some of them, or none of them, but be quick – the hats get put back in their boxes on January 4th!