1. Bitcoin is a special commodity with huge imagination, great controversy and huge price fluctuation. 2. It is very likely that due to various defects, Bitcoin cannot reach a certain scale, enter a positive cycle, and finally die like Esperanto. 3. At present, the risk level of Bitcoin belongs to venture capital and does not belong to the investment field of ordinary people. If you must invest in Bitcoin, please make sure that you fully understand Bitcoin, invest with spare money, and be prepared to accompany you! 4. Strategically, it is recommended to make long-term small fixed investment. When making a small fixed investment, when the price of coins is low, the number of coins purchased will automatically decrease, while the number of coins purchased will automatically increase. History has proved that this is the least risky strategy. Even if the luck is bad enough to start a small-scale fixed investment at the peak of the three bubbles, because the short-term cost of a small number of high-priced coins will soon be dispersed by the subsequent long-term cheap coins, it will not be stuck for too long. If there is a stable asset income, such as trust fund interest, rent, equity dividends, then using the income to buy regularly is the best strategy. -This kind of investment has the least psychological burden. As far as time is concerned, it is recommended to make long-term investment for at least a few years. Most of the "masters" who play short-term band or even leveraged futures die miserably.