To me, the definition of "rich" is having more money than you need or want. How much income you have is pretty much out of your control. You get the best education you can, work as hard as you can, and you will get what people are willing to pay you for what you do. How much wealth you need is mostly out of your control. Healthcare costs are so outrageous at this point that it can be an enormous factor. The other amount is how much wealth do you want? That one is totally within your control.
If you learn to live well within your means and invest the excess carefully, your investment will rapidly grow and as your income rises, provide even more for investment. It was amazing to me how quickly this philosophy works.
If you are the sort of person who covets the nice possessions of others, lusts after everything advertised on television and wants every new thing they see, it might be difficult for you live a happy live, no matter how much wealth you amass.
I was born in a house with a dirt floor and half grown before we got electricity and indoor plumbing. Of course I learned how to live (and be quite happy) with next to nothing. I worked my way through college and continued to expand my education at every opportunity and still do. My social security is around $24,000 per year which allows me to invest at least 20% of that annually. I have some IRA accounts that require me to take a minimum distribution every year, but I simply dump that back into investment accounts. I don't do that particularly because it makes me happy, but may as well, because I have everything I need - or - want.
I guess I could buy one of my great-great-grandkids a new house or a new car and if that honestly made them happy, then I would do it, because that would make me happy too. BUT, I have lived long enough and seen enough to clearly understand that it might briefly please them, but in the long run will make them less happy. My goal is to to stay out of their way and as much as I can, try to help them figure out what will make them happy and how they can get there. Because that's what is important and doesn't have anything to do with a specific amount of wealth or even particular possessions.
I can just wander through the world, trying my best to make it a better place and I can do that for well under $25,000 per year.