Investment advice needs to be determined based on a variety of factors, including personal financial goals, risk tolerance, investment horizon, and market conditions. Apple and Microsoft are indeed well-known companies with strong market positions and financial strength, which makes them very popular among investors. However, investing in these companies just because they are well-known companies may not be suitable for all investors. When considering whether to invest in these companies, you can consider the following points: 1. **Risk tolerance**: Although Apple and Microsoft are stable companies, the stock market itself is volatile. If you can bear the risks brought by market fluctuations, these companies may be suitable choices. 2. **Portfolio diversification**: Do not invest all your funds in a single or similar category of stocks. Diversifying your portfolio can help spread the risk. 3. **Financial analysis**: Study the company's financial statements, growth prospects, market share, and innovation capabilities to judge its future potential. 4. **Valuation level**: Consider the current valuations of these companies to see if they are overvalued or undervalued. 5. **Market trends**: Pay attention to industry trends and economic environment, which may have a significant impact on the company's future performance. 6. **Long-term vs. short-term goals**: If you have long-term investment goals, these companies may provide stable returns. However, for short-term gains, these stocks may be more volatile. Finally, consider consulting a professional financial advisor for more personalized advice. Even when investing in well-known companies, thorough research and prudent planning are necessary.