It's the difference between minimums and maximums. In most American states you have to have $50,000 worth of liability insurance to legally drive, which covers the majority of financial consequences for accidents.

That being said, now that cheap cars are $35,000 brand new, it might be a smart thing if you're an American driver to have $100,000 or $125,000 worth of liability insurance to keep yourself from going bankrupt.

The extra $100 a year for that coverage would totally be worth it if you ever have to use it.