每日钉一下（为什么指数基金的市场占比，一定会越来越高？）

Group 1 - The article emphasizes the importance of diversifying investments across different asset classes, including both RMB and foreign currency assets, as well as stocks and bonds [1] - It highlights the significance of USD bonds as a crucial component in investment diversification strategies [2] - The article offers a free course that systematically introduces knowledge about investing in USD bond funds, aimed at enhancing investors' understanding [2][3] Group 2 - The course includes additional resources such as course notes and mind maps to facilitate efficient learning and comprehension of the investment topics covered [3] - There is a call to action for readers to engage with the course by adding a course assistant and responding with "USD bond" to receive the course materials [3]