Mr. joke, why are you so rich? I believe someone has seen this joke. I want to ask him what he is expressing.

Let's review the joke first. A child asked a rich man, Sir, why are you so rich? The rich man said: I had nothing like you when I was a child. My father gave me an apple, so I sold it, bought two more apples with the money I earned, and then sold it to buy four more apples. The child said thoughtfully, sir, I seem to understand. Mr. Millionaire said, "You know your sister. Later, when my father died, I inherited all his inheritance. "According to the rich man's original statement, he continued to buy apples with the money from selling apples and then sold them, gradually accumulating. This is how children understand when they understand. In fact, the funny part is also here. Pay attention to the bright spot behind this joke! !