@Mr. Agrawal ji, I'm a normal investor only nothing great about it.
Just was fortunate to find few stocks and hold for a 8-9 years.
One of them (cannot name here for personal reasons) has gone up 150x+ and few others gave decent returns.
Infact If I'm able to apply multiple bHNI today is because of the returns generated from secondary market (along with some contribution from salary over the years).
I'm not good at short term trading (mostly resulted in loss for me) while long term investing has worked well for me till now.
I wanted to move some money out of secondary market (due to overexposure) that is when I deployed portion of capital into the IPO market.