Most gamblers quit right before they become rich

Not unless you do it outside a golden palace that abstracts your money into vouchers and chips.

But generally wealthy people make more gambles in business, partnership, accountability, other people's lives and social welfare, and the general stability of the world.

Like say becoming an arms dealer then paying the cost of a F-150 economy package to a couple senators and having them spend their endless war chests with no audits or oversight on some missiles to kill some goat farmers or something.

Or creating a pesticide with the upside of remaining active in soil for 4 or 5 centuries (and recycling in the human liver for up to a year after exposure) and having it produced in an impoverished southern town and then exported to French Polynesia so they can continue to grow cloned banana trees.

Or like taking doctors on nice yacht lunches and golf trips and telling them yes you really have developed a non addictive opioid.

Are you gambling with your money or other people's?

Was any of your ancestors a particularly successful mass murderer in the middle ages?

The serious answer is that you need to play positive sum games.