it requires good research and analytical skills, to determine which coins are good for trading and also when is the right time to enter the market and exit the market. Don't forget how we control our emotions when trading must also be considered, meaning that many factors influence so that we can become successful traders. That's why more people lose when trading crypto, than people make profits.
I myself still often experience losses when trading crypto, so I have not dared to make crypto trading a full time job.
Majority does use it as a side income and not their main income for sure, there is no denying that. However, there are more and more people who make it their full time job, that is the point here. And it is true, there are way more of us who work for crypto, some of us via trading, some of us getting employed, but in the end we are more and more. This is why I believe that the statement is true, even though majority is still doing it as side jobs, there is an increasing amount of people who do it as their only job.
I hope that people will realize that it is a much better job than any job the world could provide us in some offices inside cubicles.