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.
experience is the best teacher to find trading techniques that suit us. it looks easy, but will be able to find out the difficulty if we are already trading in real. and it's our job to correct mistakes in trading until it becomes an experience. Of course, there will be complex problems that must be solved, so that it requires heavy steps before gaining glory in the world of trading, Of course, from natural selection like this, fewer traders will succeed in overcoming obstacles, and more of them will fail, with the biggest problem being their own psychological control.