Of course, you can use sports betting or playing in a casino as a way to earn money online, but it's risky. Moreover, you need to have certain skills and knowledge and be able to take risks and be prepared to lose. I recommend reading this article -
https://www.archyde.com/how-to-earn-more-remotely-top-5-job-compatible-income-options/ . It talks about ways to earn money while you sleep, relax, go out with your family or work at your main job. Perhaps, one of the options will suit you.