Here's a thing that should all end up fine

-Uber sells stake in thing to parent Softbank

-Uber books profit

-Softbank writes up the value of its stake in Uber.

-Meanwhile, Tencent also writes up its investment in Uber, passing it thru to earnings, driving up its share px, which in turn passes thru to its parent Naspers.

I just don't understand why there hasn't been a crash yet (and tbf FT has a whole "this is nuts when's the crash" series. 

Am I just thick or are all tech cos on the verge of massive exponential profits?