I don't get how Uber gets so much money thrown at it, when it has not proven ANY business fundamentals. Sure people use the service, and like the service, but w

I don't get how Uber gets so much money thrown at it, when it has not proven ANY business fundamentals. Sure people use the service, and like the service, but when the service is essentially a perpetual loss-leader what's the point? Self-driving cars could be 5 years away, or it could be 20. I remember google saying they'd be on the road and ready for prime-time use by 2017, well that's come and gone. Fact is the entire game will shift when they do hit the market, manufacturers would be STUPID not to make subscription plans where you don't 'own' a car, but you pay $500-1000/month (includes insurance/gas/etc...) for a car to pick you up, take you where you need to go, then when it's not working for you - it's working for someone else nearby (cutting down on congestion at the same time). When all the car manufacturers are their own uber, where does that leave uber?