It is def possible. Depends on various things though. I would say its more about your self-discipline rather than how you know numbers. Your risk tolerance, ability to treat it like you full-time job, and just personality in general.
Yeah, it is all depending on our discipline on how are going to do things because if you have discipline then any source of income or field that you will do then you can be successful in it and that is why it is more important to have a good self-discipline and also patience in order to get the things or the results that you really want.