Experience experience and experience again. The market does not lend itself to logical forecasts. Even large traders say that they constantly manipulate volumes in the market,
therefore you need to understand how whales think and replay them, which, in my opinion, is almost impossible to do on your own. Find a teacher, this is the best and fastest way to gain knowledge and experience.
Before you start trading cryptocurrency, you should get the basic knowledge about the asset being traded. Look at the charts, the book of orders - this will help to understand the framework in which the coin is being traded and determine its volatility. A novice trader is better off choosing digital assets with medium volatility. In this case, the price movement is more or less predictable, and the chances of losing an investment are minimal.