Pit bulls are descendants of the original English bull-baiting bulldogs and have historically been bred to fight other dogs. Their strength, loyalty and genetic predisposition to engage in attack has created a market for some breeders to selectively breed for aggressiveness toward dogs and humans. That eliminates a lot of potentially good homes. I simply don't have time to properly train one or give it the time and attention necessary to meet the needs of this extremely energetic dog. No, not unless I knew everything about the dog's ancestors and their characteristics and just as much about the people who wanted the dog.
Dog aggression is a very serious issue with pit bulls.
Even if you don't have other dogs, you will eventually come in contact with one. Early socialization is absolutely essential, but even that cannot override genetics. Because of their strength and exuberance, they are not good matches for small children either. Their unpredictability can present problems as well. The pit bull is the result of an incredibly sad history.