[xdude]

i think instagram is more popular then facebook. but almost no one likes instagram because every time they made account... it got hacked.
instagram needs to upgrade security

Nope. Facebook is still the biggest one out there. Instagram is just a photo application and without a Tab or Smartphone you can't do much unless you are above avg when it comes to these stuff. Facebook still dominate social media because it has everything people expect from social media network.  Photos, groups, Games, Instant Messaging etc etc. It's nearly impossible to any other network to complete with them.