They say that chance only knock ones you have to grab it but also you have to do something you have to work on it wisely. Chance combined it with intelligence it will be better a chance to be rich.
Yes, I believe it is really true that luck plays the key role to most successful individuals because not all intelligent people become successful in life. It is not a measurement of success it is more on chances and luck. A person that is not so intelligent but has strategic plans and hardwork are more likely to succeed because they already know what they are not capable of. So they don't rely on their brain capacity that's why they need to work harder to reach their goal.