Lyft, Uber, Pinterest: Are internet unicorns really worth billions?
Lyft, the ride-hailing company, sold its shares to the public for the first time, heralding a march of the “unicorns”. A stream of these businesses – which are defined as private, venture capital-backed firms worth over $1bn – are set to follow, including Lyft’s rival Uber, online scrapbook company Pinterest and home-sharing site AirBnB. And…