What's the op is saying is about employability, he wasn't talking about profitability. It is true that many traders losses more than the gain. But then anyone who is into cryptocurrency trading for more than one year must have found a way to gain because you cannot be losing and losing and you continue losing.
Some people will think they can make it from trading, but they will see the worst part of their life when they begin trading. More than 80% of traders are losing and which should be one of the reasons it can not be seen as a job. Trading is not a job. But if you manage to have enough money to trade, risk less and be able to even go less than 1x leverage and able to afford your loss and having better source of income with your less risky source of income will not make you feel the bad effect, then trading can be a job for you. But telling people that trading is a job is not right because you are only not helping them with wrong information but also helping them to believe what can cause them financial problem.
Many people on this forum are not trading, they just understand little part of it and saying it is a job. It is not a job.
Some people make more money teaching how to trade than trading itself, some people write journals on how to trade and some people provide signals. In whichever way you are able to end in the name of trading, it is fine I should be recorded for you as a genuinely and money. Therefore someone who is a trader could be considered employed by himself if he is doing it professionally. Yet, it is advice that a trader should have another source of income to augment in terms of emergency and uncertainty because trading is a risky business.
If you are teaching about trading, providing signals and writing journals about it, you are not trading. You are only letting people know what trading is and earn money from them and nothing more than that. Trading is when you trade and make money from it. Some peoole can teach and provide signals but yet be losing in trading.