I fully agree on Lyft and Uber and I think the public is getting duped on this IPO. Its worth pointing out though, that people said the same thing about Amazon's IPO.
To be fair Amazon is profitable, but their stock is extremely inflated by over speculation. The idea is still the same. Dump cash into the stock and hope others do the same driving up the price of the stock in the hopes that you can drop it before the bubble pops.