Only two things
1- Tolerate the pain for a long time
2- Master the ability of being alone
If you can't do those two things it will be hard for you to achieve great things but why?
Because it's lonely at the top
Everyone is against you
The odds are against you
The government
The society
Your competitors
Your friends
Your girlfriend
All of those are shitting on you and you will be a lone wolf fighting
You will end up lonely questioning yourself if you are a madman