You primarily need car insurance because it’s required by law in most states. Drivers must purchase a minimum amount of car insurance, which varies by state and generally includes liability insurance and underinsured or uninsured motorist coverage.
In many cases, you may want to increase your coverage limit above and beyond what is required by law since doing so can help to ensure that you’re protected financially in the event of an accident. Not having enough coverage could mean you’re stuck paying a huge amount out of pocket for car repairs or medical bills after an accident.