http://techcrunch.com/2015/06/26/the-tech-industry-is-in-denial-but-the-bubble-is-about-to-burst/
Note that we've been hearing about a venture capital bubble for a couple of years now. Here are links to prior posts on the bubble. A good place to start is my post in February of 2015:
http://www.allenlatta.com/allens-blog/are-we-in-a-venture-capital-bubble-more-thoughts
Other posts include my thoughts from April 2014: http://www.allenlatta.com/allens-blog/is-venture-capital-in-a-bubble
A post from March 2014: http://www.allenlatta.com/allens-blog/fred-wilson-on-the-bubble-question
Finally, a post from April 2012: http://www.allenlatta.com/allens-blog/tech-bubble-two-views