I guess everyone wants to be the next Mark Zuckerberg but, social networking might not be a good option right now. Social media market is very saturated and has many big names such as Facebook and Twitter. These companies have more than miles lead to those who want to start their own social sites. Not to mention they already have most of the "users pie."
Sooner or later these people on social media will decline from these sites just like they did with Friendster. Lest, they found an alternetive to SNS.