Why Pitbulls are a good choice of Dog!

Pitbulls are a great dog to have when you live in a rich neighborhood or just want a great alarm! You can train these dogs to just bark when someone breaks in at night or even attack if they break in. Personaliy my dog is a great guard dog. He doesn't bite but he has one vicious bark! These dogs seem to be a vicious guard dog but, they are usually a better dog if they just have vicious bark. Please tell me how you think pitbulls would be great guard dogs or bad guard dogs?