I believe that investors need to have a correct and clear understanding of Bitcoin in order to judge whether to buy or not. Bitcoin seems to share the dividends of the blockchain in the long run. After all, there is Bitcoin first and then the blockchain. In the short term, the entire long-term process will always be accompanied by constant differences and games between funds and funds. The long-term inevitability cannot conceal the short-term game. Therefore, the source and attributes of the investor's principal determine whether the investor's mentality can withstand short-term fluctuations. The health of the principal source should be in this order: own idle funds>own funds>family funds>others’ funds>borrowed funds. For a novice, if the principal is not available, it is its own idle funds, at least it must be its own funds. Before years of proving to be fully capable of investment, the last three options will only add endless troubles and risks to our future. Of course, when you are really confident in Bitcoin and feel that it will certainly rise sharply in the future (Just like it was in February 2020), but you are limited by no funds on hand, you can consider using a credit card to buy. Well-known exchanges with strong execution power have already launched such services, such as ZB.com. But it should be noted that this will undoubtedly increase your investment risk, so invest rationally.