Facebook is losing users left and right in the US and Europe, with 7.5MM members dropping off the site last month alone for competitors like Instagram. But are we really all that surprised? Afterall, there’s no commandment that reads ‘thou shalt always use Facebook for your social networking needs.’ Although western countries appear saturated, the company is experiencing robust adoption in emerging markets including India and Brazil, each with about 60MM users to date and plenty of room for more friends. While there’s no reason to believe the social media giant will disappear anytime soon, nothing lasts forever in the technology. Just ask Chris DeWolfe or Tom Anderson (if you’re Alta Vista’ing those, I rest my case). I discussed this and more with Fox’s Neil Cavuto.