> It's that willingness to spend 30 years working on a problem that builds a multi-billion dollar company.

Yup. This is the investor mindset. I'm guilty of selling out too early in various things, stocks, companies, etc. Sticking things out with your "investments" can have a significant return.

Knowing when to bow out early is also a valuable skill. Skill, experience and luck; sometimes in any order and quantity.