If something bad happened to the car, how much money would satisfy you as compensation? Probably a lot less than $150,000? Enough to buy a replacement? Remember, as an inherited asset your cost basis in this vehicle is zero, so any insurance payment you might receive as a result of an accident is gravy for you. Insure it for something close to what you would pay for a replacement, if that is what interests you. If not, insure it for what you would be happy with, get your liability coverage from Taylor, drive it and move on.