Why would a rich man commit suicide?

Before writing this post I did a Google search on “rich man commits suicide”, there was no lack of stories.

How is it physically possible for someone to take their own life?

Is it in order to feel better? If you stop existing you won’t be at all. Doesn’t it seem that people know there is an afterlife? When a situation gets really bad people think it’s worth the gamble to die and try the next thing.

Let’s take it further;
If we are only physical them all we should care about is food, shelter and procreation. Why would a rich man commit suicide? I’m not referring to a man who lost his money, I’m referring to a rich man is his peak. He could buy all the food he wants. He could have a bigger home then he could use. I’m sure he would not have a hard time finding women ready to live with him.

Could you give a natural explanation?