I have known the forum for a while, and it is very frequent to see many legendary activities. It can be seen that they spend a lot of time and energy to maintain the normal operation of the forum, and of course many legendary members are not staff. So I feel like they're all doing bitcoin full time. In fact, working in the decentralized financial field is a new form of work, which may be fully reflected in various DAO organizations in the future and will be rewarded accordingly. Many people will also say: You bought Bitcoin, put it there, forget about it, you dont need to work. It sounds ridiculous.
If you consider like signature campaigns by those legendaries, (I'm not there yet), it's not like they spend a lot of time here. Perhaps maybe 2-3 hours a day max I reckon to do their post, maybe answer some DM's and then look around the community and see how is everything is doing.
But if you are talking about individuals who do trade and yeah maybe it's considered a job, then probably they spend a lot of time on it. Because in trading you need to be in front of your computer to see how the price is per hour or per time frame.