Observations (while limited data points)
1. Mcap/sales (0.5-2x)
2. Market discounts next 10 yrs. To make decent money on absurd starting P/E , 10 yrs hence , markets estimate of another 10 yrs should be rosy. Effectively 20yrs of performance.
The best case scenario is medicore. or Head I loose, Tail I don't win much.
(This is inverted version of @MohnishPabrai saying)
You can as long as you know when to exit!!
Someone who has done this successfully is @BMTheEquityDesk who exited in Pantaloons, Bharti Airtel, Page etc in time.
He might have already exited BajajF as well