Many people read "Rich Dad, Poor Dad" by Robert Kiyosaki. Many also read another book by him entitled "Cashflow Quadrant". I read the book in 1998, it was one of the first few books on Personal Finance I read when I started learning about Personal Finance back then.

Many people had the wrong concept that they want to move from "left quadrant" (employed and self-employed) to "right quadrant" (investor and entrepreneur).

It's all wrong! Why? Becos as far as I know, the most wealthy people in the world typically are in ALL 4 quadrants, ie. they're "employee", "self-employed", "entrepreneur" and Investor". All 4, not 2 or 1 quadrants.