Bro, where do you get your food? Do you grow it in your house? Where do you get your water from? Hell, where do you get your air from? How do you think getting a security system fixes it?

A security system wouldn't necessarily stop Boeing assassins from breaking into your home, killing you, and making it look like a suicide, but it certainly would increase the chances that they were caught, or at least increase the chances that police would consider it a homicide instead of a suicide.

Will a gun protect you when your car accelerates to 150 mph directly into a tree? A couple micrograms of toxin being sprinkled into your coffee? The CIA had a heart attack gun 50 years ago. Not difficult to imagine the capabilities they have today.

Nope, but it would probably help in the instance here, where I guess according to you, Boeing assassins broke into his home, and forced him to commit suicide with a gun(or, killed him with their own gun and staged it perfectly to look like a suicide).