for some people it might be so. especially for those who are already comfortable with crypto. and also has no other job. then they certainly will make his main job as crypto.
Maybe not all the people even those who are already comfortable are not spending full time in crypto or those who have a stable job aren't giving their full-time. Maybe 4-6 hours in crypto and for sure the other people are resting in this situation of market.
I think crypto can be a fulltime job but it should be back up by other source of income for continuity much more if there is a family who depend on, as we know that crypto is always have an opportunity to be profitable but not guarantee to have a continues income monthly or weekly. Maybe if we have high skills and technique that surely gain income continuously.