Bitcoin is the most suitable cryptocurrency for long-term investment. It promotes the development of digital currency. Altcoins are based on Bitcoin. Bitcoin has withstood the test of time. Now a large number of users are beginning to invest in Bitcoin. Bitcoin has relatively strong technical support and high security, so many people are willing to invest in Bitcoin and profit from it. Altcoins are only suitable for short-term investment and profit, long-term investment will have higher risks.