Rideshare platform Uber is looking to raise $2.1 billion. Uber is the most valuable technology company on paper, at a current $50 billion valuation. The additional funding would bring those figures up to $62.5 billion in value. Compare that to Uber's U.S. rival Lyft, rumored to be raising half a billion at a $4 billion valuation. Lyft is aggressively spending to compete with…
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