What is the future of social network?

Nowadays I see that Facebook is already walking to the end of line. As did Orkut and other older ones. Instagram is growing but already near to the top. What do you think will be the best solution for the socialmedia in the near future? Is there any promiscuous one already in development? Anything related to the blockchain?

Sometimes I take myself thinking about the future and trying to discover how it will be. Maybe the answer is just in front of our eyes and also very simple that no one can even imagine.