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.
I have seen individuals with big pays and yet had nothing just because they did not have a clue on how to handle their earnings. Earning money and retaining money are two totally different artworks and majority of the people concentrate on the former. It is financial discipline that actually makes the difference whether in the short term wealth or long term stability. I also believe that what is actually freeing the people is the act of knowing how to invest wisely and live within one means since having money and not having control of it is purely an illusion of feeling rich.