It can help you make money, for sure. But is it ideal for you or not is the question. Do you have the skills? Do you have a strategy? Can you control emotions? There is no definite answer
The first priority of becoming a trader is to learn the skill without any skill such a trader is bound to lose, of course a trader can earn a living as a full time trader, however this comes with a lot of experience in both technically and fundamental analysis including long hours of charting time plus control of emotion while trading with a strategy, there are good numbers of traders who trade for a living and earning decent money consistently, I think the OP needed to educate his brother to follow all the necessary procedure and learning paths towards becoming a successful trader and risk attach to it.