I actuall do not know anyone that is on full-time trading.
There are really those real-life full time traders, I know a few of them and they are living with their profits through it.
Most of which that I knew are doctors, students, IT professionals, teachers, and a lot more.
These professionals can also be a trader but differently from being a full time trader. They can be an investor and trader at the same time but they don't have full time to allot with their trades because they have a real-life profession to focus with.
As of the market being volatile, I think having an stable job is safer that trading with full-time focus on it, though you might be able to predict/see through charts/event/news what could happen so you probably are prepared what to do.
Those who are experienced, they know about this. They're likely to find a job and focus with it but they choose to be a full time trader because they are also getting freedom from it and as well as decent profit if they're professional on it already.
Also, as I've browse different social media platforms, I've read about those youngsters that are very successfull on their trades. Your choice in the end.
Yup, that's it. They've chosen to become a full-time trader because they see their future on it. Not everyone can be one.