How that is some people can retire at 50? Or not lose their shirt when theres a stock market crash?
Why are some people able to earn high incomes or even have multiple streams of income?
How come some people retire to a life of luxury and world travel, while others barely have enough to feed and house themselves?
Of course, one part of it the answer is that some people are more intelligent and industrious than others. No matter what anyone says, we are not all the same. We may have been created equal, but no one has ever guaranteed us equality of results. That depends on our own efforts.
Another part of the answer is that some people consider the risks they will face and do something before they occur to mitigate the damages. One obvious way of doing this is by buying the proper kinds and amount of insurance to protect your home, health and life if you have an income stream to protect.
Less obvious, but still a very helpful plan is to become an expert at whatever you choose to do to make yourself indispensable to your employer.
If you work for yourself, you want to be the best at whatever it is youre doing, from practicing medicine...