They can continue growing the business while giving other employees a larger share of the asset. One person doesn’t create a billion dollar company, dozens or thousands do. After founding, other people who don’t become billionaires work similarly hard and are similarly smart as the founder. This is why people dispute “earning” a billion dollars.

You don't have a solution unless you can propose a way this gets legislated and executed. No hand waving. How specifically does this work? Suppose it is day one of my shares being worth more than 100m. What happens?