The first rich person I ran into had a wedding gift of several million
1970s dollars. The whole "live frugally and become rich" thing is fine if you're prepared to remain single and/or not procreate. Other than that, you'll need some sort of Dutch Uncle.One of the richest I worked for wore Kmart clothes and drove an oldish car, and lived in a nice but unfancy house. He was the sort who had a PhD from a state U in the 1950s in physics and went to work for a Fortune 500 until the Fortune 500 left millions on the ground, so he pulled a startup in the 1980s.
But he made most of his money in real estate.
They have little else to do. It's the only version of the Cinderella myth left.
The "real" part of the economy - the part you can see and is not paper wealth - has grown much more slowly than stocks and paper.