https://www.businessinsider.com/bill-gurley-sxsw-talk-on-dead-unicorns-2015-3?r=UK

Are our two biggest unicorns, farcebook and giggle goning down this year?

http://fortune.com/unicorns/

They’re called “unicorns”—private companies valued at $1 billion or more. The billion-dollar technology startup was once the stuff of myth. Today they're seemingly everywhere, backed by a bull market and a new generation of disruptive technology.