I can totally see a situation where a new entrant comes in at a point where the system stabilizes, and can be quickly profitable, if only slightly, but survive,

I can totally see a situation where a new entrant comes in at a point where the system stabilizes, and can be quickly profitable, if only slightly, but survive, while Uber and Lyft are contending with extreme pressure of what is essentially soft debt. Do any of Uber or Lyft's investors want those companies to by in a super competitive market where the profits are thin? Maybe that pressure causes them to make wild swings that are much more risky. How rationally will investors approach their investment?