 To live in a world where your credit card balance wasn't hit with crippling compound interest, oh, man, that would be nice. Unfortunately, we don't live in that world. It really is unfortunate. And if you're someone who's had to use credit cards a lot, chances are pretty good that you could end up in debt up to your eyeballs eventually. Talking about the kind of debt that can wipe out your savings and set you back years, if not forever.