One question to ask is, "what course/uni will I be able to attend after dropping out?". IE. Will it be worth the time and money of doing a second degree if you can only go somewhere lower ranked, or a less competitive course.
In a lot of cases, I imagine the answer is no, and you'd be better completing your studies, (retaking if necessary), and moving on with whatever classification you end up with. Lot's of grad schemes and grad roles don't require a specific subject.