I think the long-held cryptocurrency should be Bitcoin and Ethereum, and their prices will not be reflected in a short period of time. And this year's encryption market is very bad, I think this year's cryptocurrency must be held for a long time before it can make a profit.
Bitcoin and ETH are the most reliable crypto assets. But if you want to make a significant profit, then you must make up your portfolio so that it has several small but promising coins. Now the market is at the bottom and such small coins, when it is restored, will very quickly make X-s.