We can see many examples of that in famous ppl, which had an incredibly huge income during a period of their life, and suddenly when that income ends, they have a hard time not losing most of their assets and struggling to survive.
Our relationship with money is quite different from any other thing. Those who have gone through day trading know that quite well. We don't know how we will respond to many of the decisions we may have to face if we ever get a huge amount of money in our hands.
It is true that the older you are, the more common sense you put into your decisions, and basically, you spend more time thinking about the important ones before moving forward. But it is quite hard to know our reaction when we face something for the first time. Maybe some of us would not spend big sums of money on things we don't need but would invest in something we do not understand enough or without evaluating the risk properly. That could also lead to losing most of that money and facing trouble if we have an imbalance between what we earn and what we spend for a living.
celebrities, athletes, rich kids...
Being able to wear those losses daily, even for an hour or two, must cause heart issues.
I think this would be the most common loss of the majority - overconfidence in knowledge. Having a lot of money, doesn't mean knowing a lot about making money.