Is Uber really worth billions of dollars?

The ride-sharing firm is yet to make a profit, but it may attract a sky-high valuation when it floats.

Uber CEO's compensation is tied to $120 billion valuation

How Does Uber Make Money? Uber Business Model Analysis - FourWeekMBA

Uber is now a profitable, cash-generating machine

Pinterest shares soar in stock market debut - BBC News

Uber's Eye-Popping IPO Approaches. Is It Really Worth $90 Billion?

Uber: One of only 3 unprofitable companies worth more than $50 billion

7 CTOs behind the hottest billion-dollar unicorn startups

Lex in-depth: does Uber deserve its $91bn valuation?

Is Uber Really Worth $62 Billion? - Barron's

Uber CEO Dara Khosrowshahi: The Complete History and Strategy

What do drivers think of Uber? - BBC News

Uber shares fall as fears over Lyft's pricing eclipse first operating profit