If you are able to learn well and have knowledge about crypto trading, you defend on it because many people are depending on it to live as they have no alternative.
Although, it will be very good if you have physical business as backup, but it also involves risk which is a bit lesser than the crypto trading, but if you have the knowledge, make it your main source and you will earn from trading if you are not greedy.
Having knowledge is of course very important to be able to get a good income from trading, because it is impossible to get good results in trading without good knowledge about trading and if we choose to persist in trading because it is difficult to get income from other sources. Another thing, of course, is that we have to have good knowledge about trading so that we can continue to make profits from trading and when we can get profits, it would be better if we used these profits to try a physical business, which of course we can master this well so that we can run it. Of course, greed is very detrimental to us in trading, so it is important for us to be able to control our emotions when trading so as not to be greedy.