You need to employ common sense from the point of car purchase. Different cars have varying premium demands. Certain Cars are more expensive to Insure than others. If therefore you had this in mind before buying a Car, you would get a car that meets your Auto requirements and is comparably cheaper to insure. You would of course need to ask people who know.
Imagine that I got a car for $10,000 and took up a $20,000 collision policy considering that your car value doesn't increase but it rather depreciates. If something happens and you made a claim, you would be required to pay some deductibles. putting all this together you would agree that is not the best of decisions. Your car insurance should add value not add stress.
Am I advocating getting cheap cars and taking the lowest coverage you can get? No I just need for you to be aware of the things that affect you insurance cost. Think through all the factors and you would actually be surprised at how it could affect your choice and decisions.
What makes sense in one situation will be totally unwise in another. That is why you are the only one who is most equipped to make decisions as to what you think you need and what you don't.
Let me conclude by saying that even if the options we choose would result in an increase in our insurance expense, with the right information, we can still find ways to save on your car insurance.