Because you lost money in the bear market and didn't make up your position, you have to charge a management fee for ten years, so if you lose money on a fixed investment, you will earn it. Even if you buy at 0.8 and the net value of 12 drops to 0.5, you still lose 0.3. As long as the profit is 30%, buying a fund is the best way. There were mice in the fund at that time. Buying a fund depends on the fund account book and understanding.