One thing I have learnt from all these great men is that one can be very lucky or talented at making money, but unfortunately don't have that money management skill. Alot of people don't know that being able to manage the money you earn and multiplying it to produce more money is a skill on its own. It's too bad that this great men only lived for the present and never made good plans for the future.
Maybe some did make plans for the future by borrowing to fund their investments, then the unfortunate tragedy struck them. Being rich means having high income/purchasing power, it does not mean financial security/freedom. Proper planning and financial discipline can bring about generational wealth.
It's just that most of us are subject to the stereotype that rich or famous people are always smart people.
But in reality, artists, singers, athletes, or movie stars are often just people who can do one skill well, but their horizons are even smaller than the average person.
For example, people often end up in the cinema by accident, because someone liked their appearance. And at the same time, due to their artistry. These people provide for their lives and they do not need to know: how many planets are in the solar system, or what is the chemical formula of water, they just live, it turns out, their money, and often do not know how to manage it. They are not economists or traders.