Rockefeller, an American oil tycoon, is a man who knows how to use money. Once, the company planned to build a warehouse and hired two construction workers. These two workers are brothers. My brother is John and my brother is Harvard. After the warehouse was built, the two brothers went to Rockefeller's office to get their salaries. Rockefeller said to them, "If you make money, you should save it. If the cash reaches you, it will soon be spent. How about changing into company shares as your investment? " Hearing this, John felt very reasonable and agreed on the spot. But Harvard is unwilling to insist on cash. As Rockefeller expected, it didn't take long for Harvard to spend all its money; On the other hand, John has made a lot of money because of the rising stock price of the company, and he will become a millionaire in a few years.