Your mother grew in the time where the only source of income is by having a stable job or having a business, nothing else. That's the reason why your mother prohibits you in engaging with bitcoins and other jobs online because they believe that you can only earn money by working physically hard so they come up to the conclusions that online jobs are scam, a waste of time or violation under the law even they don't have a concrete evidences. This kind of mindset is very wrong, just respect your mother's opinion and try again to change what she thinks about bitcoins and online jobs by showing your legal earnings from it. Try also to discuss her about the advantages of having jobs online and prove her that there's nothing wrong with that.