You need to decide what your risk is, and who is likely to provide that risk. If your neighborhood has had few burglers your risk is probably low. If it has had many..... Are you really trying to protect valuables or are more concerned about personal safety if you are home during an attempted break-in? Are your valuables insured? Are they replaceable if stolen? How important would it be to replace them if only of sentimental value? Are the burglars you are concerned about likely to be amateurs or professional?
The answers to these questions will guide you to what type of security investment is most appropriate for your circumstances. There is not one optimal solution for all situations.
And, with the rare exception of certain types of military sites, almost every conceivable valuable and security protected place has been burglarized at one time or another. So, you need to realize that you will not be preventing burglary, only making it less likely.