Ditto. The infographic was posted recently (can't find it for the life of me) but more unicorns were declared this year than all of the 3-4 year previous to this one combined.

I think the term Unicorn will only be buried when the bubble finally bursts, i.e. when most of these unicorns burn out within a few months of each other.

I was going to make a site called "unicornmaker.com" as a bit of a joke where it would buy one billionth of your company for $1, in return for a $5 service charge and would provide a nice certificate and press release for you. Didn't quite get round to it though... Then everyone could have a billion dollar company.