Now that Dropbox has gone public, and Airbnb is a billion dollar company, and Weebly has sold, what are the next wave of YC startups?<p>The last group of YC startups that was well-known was in Sam Altman's 2015 bet: Stripe, Zenefits, Instacart, Mixpanel, Teespring, Optimizely, Coinbase, Docker, and Weebly.<p>Who are next?