To equate reading to becoming millionaire and billionaire is a fallacy . There are many who read but are not millionaires .
Millionaire and billionaires exist because they are shrewd and take calculated risks. They know where to sniff opportunity and get ahead before others.
Reading helps to develop awareness but the ability to think and act smart makes the difference between mediocre and the super rich.
It's a mindset. Read "The Richest Man in Babylon". It ranks up there along with Rich Dad Poor Dad.