Bhaisaab! Who told you he sleeps for under 4 hours on daily, have you ever procured a daily regime of him? No. he's also an individual's, mate!
He, being ambitious, hankering for unprecedented success forces himself to curtail his sleep to 4 hours occasionally i.e. when the case demands so.
( current pic of khan with dark circles below the eyes attempted to be shrouded with eye fillers and make-up )
Well, that is the attribute of an highly ambitious man, sitting on giant assets of 6000 crore rupees may be a herculean, a mammoth task, and sacrificing your sleep for that's also the peak of perseverance and resilience.
Sleep deprivation comes with a bunch of side effects including weight gain, hormonal imbalance, fragile or irresponsive system a nervosa, weak immunity and upset of stomach and bowel movements.
But King Khan would have successfully overcome these hurdles by following a supervised diet, cardio, exercises or what not ( still I'm wondering how he accustomed manage for that too) or is also these thing became part and parcel of his life and he has learnt to adapt to those things.
And despite of this he smokes or perhaps drinks also, woaah what a titanic he is!
God was seemingly extra ‘meherbaan' while creating this being.