Hmmmm... As simple as the rule of wealth is, a lot of people can't gain from it.
Investment is the key to wealth but instant gratification us what most people want.
The whole YOLO thingy.
A lot of people need to know how to control needs, wants and desires.
People need to invest in what thy need, to get what they want.
A lot of life lessons for success, are not taught - delayed gratification being one of them.