Anything worth achieving in life has a dip
I do not think you can get rid of the fear... but you can dance with it.
Success brings with it the fear of blowing it. With more to lose, there's more pressure not to lose it.
I intentionally abandoned the hard stuff early on because not only do I think it's useless, I think it's a distraction.
Don't save the canary. Fix the coal mine.
Some people read business books looking for confirmation. I read them in search of disquiet. Confirmation is cheap, easy and ineffective. Restlessness and the scientific method, on the other hand, create a culture of testing and inquiry that can't help but push you forward.