Dangerous when you are alone(especially girl)

The world is very dangerous now..the world dangerous i meant is not the world is going to end soon but it is about the society. For example, the crime percentage reported nowaday is more frequent especially murdering and raping. The most recent report in the newspaper is about a 20 years old girl student was raping and killed in her own "living place". People usually say own house is the most safety place to avoid the crime. But after this case happened, how to your think about that? Is really own house is most safety in the world? This really make me felt scary after ask this question.... no more safety place and dangerous may be coming anytime!!!! This showed that the world is getting more complicated and police is less effective to protect our society....sad.