The second reason why you can never become rich is not knowing how to use money. There are several ways money can be use : spending, savings, and investing. Many of us already know about spending and even when we spend we spend on things that are not really needed but just to impress people who don't care about you.
Buying liabilities, things that doesn't have value five years from now. Many save but even when money is saved, it is done to spend and not to invest and the only way to become rich is to invest and not by savings. So , invest in assets and not liabilities.
On the one hand, when you hire (if you have a company or business) members of your family, this can burden you, slow down your business (and lower profits), because instead of your family members, you could hire other people as employees (links to their professional excellence). But on the other hand, there are many examples of successful family business, which allows you to increase wealth in the family and an individual family member as well. I think this should be based on the availability of resources (human capital) that you have and what you are like as a business leader.
The ability to use money is a very important quality. Everyone knows how to spend money. Saving money is stupid because it is subject to inflation and money is meant to be an instrument of exchange, not a savings. Investing is another matter and should be learned.
Are you talking about impressing people with things? How about buying an iPhone on credit? I know of similar examples. In a year or two, your phone model will be of little interest to others, even from the point of view of making an impression.
The only way to get rich I described in the first sentence.