Take a look at these Fascinating Facts. If this doesn't convince you, not sure what will. 

Fact 1: There are over 1.71 BILLION monthly active users on Facebook.
Fact 2: Age 25 to 34, at 29.7% of users, is the most common age demographic on Facebook. Age 25 to 
Fact 3: There are an estimated 320 million users on Twitter.
Fact 4: 300 hours of video are uploaded to YouTube every minute!
Fact 5: 41% of U.S. based LinkedIn users have an income of $75,000 or more.