An online liberal arts degree can be as worthwhile as any other bachelor's degree. Your results depend on factors like how hard you study in school, the types of experiences you are able to gain as part of your degree program, and the positions you apply for after you graduate.
If you ask people you know, you'll also find that many people with bachelor's degrees wind up working in fields that are not related to their degree at all. That said, earning a bachelor's degree can help you get your foot in the door in any number of rewarding positions, at which point you'll receive more training and build your experience as time goes on.