Read about REAL people who started with nothing and died with stock fortunes. Being female helps since you're more apt to live to extreme old age. Having kids rules out most people from amassing great wealth. No surprise there!
This article doesn't mention that orphan Grace Groner made her money buying stock in her life-long employer, Abbot labs. where she worked as a secretary. She had no kids, lived very modestly and never learned to drive a car. Interestingly, Groner was a renter who never owned her own residence. Still, she was a lovely productive woman.