Why spend 3 or 4 years of your life for "in case things go wrong". Instead, why not do what you want to do and if it goes wrong, then do your degree?
Forget backups. If you're going to do a degree, do it with purpose. I own a firm where I provide law degree students, best law assignment writing service You'll work harder, you'll do better, you'll enjoy it more - as you'll have a purpose. You want to be a doctor, you want to get into investment banking, you want a job where you need a degree, you want to learn mathematics or philosophy, sure, do a degree. But spending 3 or 4 years of your prime and taking on massive debt on a backup plan is the plan of someone with a defeated mindset.