How old should a car be when you stop carrying collision?

How old should a car be when you stop carrying collision?
that is relay up to you, i have a 1997 ford ranger with 255,000 miltes ,i use it everyday with full coverage. Just remember if i get hit and car totalled, the check from insurance won't be enough to replace it. Most people drop full coverage after the vehicle gets 10 years old just strickly for financial reasons.