When thieves break into a house, they are not likely to be concerned with the personal safety of anyone in the house. Beyond theft, there are people who are interested in breaking into houses just to hurt those inside. Home security systems deter and help prevent these types of attacks.
In tough economic times, thieves are more likely to be brazen about breaking into homes for valuables. At any time, a house may be broken into even if you don't think you have any valuables. Thieves can find value in things you might not.
Having a security system in your house is can provide an additional selling point when you go to sell your home. A security system also adds actual financial value.
Having a home security system may lower your home insurance. If your house has already been broken into, insurance companies may suggest or require you to have a security system to insure you or to insure you at a better rate.
Peace of Mind
Having a home security system can help you sleep better and give you peace of mind, knowing that if someone were to break in, you would be alerted. Any strange noises in the middle of the night can likely be relegated to the house settling or something less serious.