That's definitely one of the things that you can consider when you are talking about trading and if that's what you have experienced so, why not?
For me, the people who are earning a lot are not so noisy about it and just keep it in a low profile unless it's an enormous amount of win and needs to be televised or something.
No one would want to trade without wanting profits in return, as there are a lot of successful traders but chose to be silent and stay low key despite of their huge wins or profits. Those are obviously doing trading to earn a living, regardless if its main source or not. As long as you have great strategies and skills in trading, trading will always be working and profitable in the long run.