Cryptocurrency trading requires experience, knowledge and various supporting factors in order to make a profit, but sometimes the field is always different when you start trading.
For example, someone who is an expert in trading in cryptocurrencies, maybe 5 years of trading but when there is bad news and Bitcoin goes down, all altcoins also go down and the trader, even though he has 5 years of trading experience, his asset portfolio is still declining (sold at a loss).