What type of crime most threatens society?

As far as I'm concerned, the worst crime is fraud. Murder and terrorism are crimes that carry the heaviest penalties. Fraud affects huge numbers of people around the world at all levels of society. Especially, elderly people can be easy pray of fraud. The more the old population increases, the more crimes targetting elderly people will increase. Moreover, crimes utilizing computer technology has also increased and includes producing counterfeit and altered credit cards. Thus, crime has become even more malicious and cunning as ever. To put it in a nutshell, fraud is the most dangerous threat to oursociety.