The lesson I got from looking at all these influential people is you can be exceptional in your field but if you do not know how to manage your money you might just die penniless. I personally do not want to pass away after suffering from poverty. I want my last days to be spent in bliss.
When we only spend without thinking about saving and investing, no matter how much money we have, it can all run out and even lead to debt.
So, sometimes it's not about how much money we have, but how wisely we spend and manage it. Otherwise, the money we earn will simply be spent thinking there will be more later, including going into debt to pay it back when we receive our income, even though our income will inevitably be used up for living expenses.