Li Daxiao said that the most precious things are free or free. I agree with him. For example, the level of money earned by selling courses is definitely average. Masters are quietly making money, but you just don’t know how to learn from them. Even if you give ordinary people the best things in the world, they may throw them away. They may not want the good ones, but they will fight for the relatively not-so-bad ones. It’s like a limited appetite, so you can’t eat a whole pot, you can only eat in small bites $ETH