Have we reached the crest of the post 2008 startup cycle?

The big ones like Facebook, twitter and many others that start just before the crash or after the crash cashed out. Many companies that started with the premise of a sharing economy like Uber are probably not at their peak but close to it. Sqaure and others have peaked and plateaued(?). There are a lot of startups in the ad space and the competition is fierce. I am not sure if there is consolidation there or not, I don't follow that space.

To me it feels like we are at or very close to the peak. The question is part to validate the hypothesis and part to gain some knowledge if I am wrong.