Trading is one of the most unpredictable jobs and that is why it is very very difficult, the volatility is huge and the markets are forever changing, it is why if you can make a success as a trader you can often earn much more than in other fields of work.
Trading is an unpredictable job but we can always rely on it in making money and that would happen if we are good trading.
We can always learn how to trade and we can consider this as a job once we will become consistent, I myself like to be an expert so I always educate myself to improve.