I don't think it is proper to refer to bitcoin investment as an online business, plus whatever you studied in school doesn't hold any relevance to bitcoin investment if you do not still learn properly about it. There are people who studied nothing regarding finance , economics or business in school, and they are still doing very well in this space.
My same advice I give to people. You don't necessarily need to quite your job to focus on bitcoin investment its not that it needs the all day. Moreover you can earn from the job your doing to help pay for other expenses and also cover for emergencies like the bear make. Once there is another source of income you can actually holdl your bitcoin in peace during bearish period