What could be special with the social network you’re going to offer? Not to discourage you but a lot of social network platforms had came up already and were not successful. if you are planning of launching or offering another social network it should be something different from the leading ones right now and should contain some features the the leading networks do not posses to make a difference and catch the attention of users. It must contain features that are badly needed that are not in existing networks. Only then you will be able to launch your coin if your network is already established.