I do not think that you can fully rely on what the demo will be a full measure of success, because if you treat it as a game or as some kind of entertainment, the probability that everything will turn out very small. But in general, the demo can be considered as a good tool for training, so that you can learn the mechanics of market analysis and trade execution. It is very important for you to navigate in timeframes and levels, learn to insure yourself and your money accordingly. So, of course, you should not neglect this tool, it will never be superfluous, the main thing is to take trading seriously and analyze your steps in the market to minimize the chances that you will constantly make the same mistakes.