Trading cannot serve as a job for you and take care of your billa in the long run because the market is fill with uncertainty, and you are trading on a volatile asset which is very risky.
Nahh that can't be true, it's sounding more like you talking of a gambler. A successful traders cannot loss all his hard earned money to the market unless he was being reckless. When I mean being successful I don't mean having 1or 2 good trades and calling your self a trader or adding FX to your name. Being successful means you have been in the market, you've understood both the fundamentals and technical aspects of the market. These kind of people makes consistent profits from the market. I don't think there's any job that would pay up to what they make from the market on a daily or weekly bases. So yea, trading can be a job mate.
Definitely, it can be treated as a job, but you really have to begin at some point and it might not be easy to grind as you need to stay maybe up to 12 hours initially to learn everything and to make money. And then as you go along, you gain that experience and learn how to adjust strategy.
You can also treat it like a business, so you financially commit on it, invest a lot of your money in order to make more money. And in order to make consistent money, you need to have a lot of discipline and again, strategies to tweak from time to time. It's a non-conventional for most of us, but if someone wanted this career path, then he needs to be dedicate to it.