a concept of money.

The poor like spending, while the rich like investing. The poor fantasize about whether to buy a car or a house first when I have money, while the rich are thinking about how to use their money to buy more assets, such as houses, stocks and funds, so that money can make more money for themselves.

The biggest contradiction between poor people's thinking and rich people's thinking is that poor people think that spending money on study is cutting leeks, while rich people think that spending money on study is saving time and energy for exploration. In essence, saving time is making money.