Hopefully you're not travelling to dangerous places with any regularity, but we've all found ourselves in more crime-ridden parts of the world at some point. If you want to save your hide, Wired suggests that it helps to carry an offering of money or other wealth so your attacker isn't enraged at getting nothing.
The idea isn't to keep all your life savings in your pocket to hand over to your mugger or kidnapper, but to offer a little incentive for them to let you go. Wired explains:
The only thing worse than a mugger is a mugger who is pissed off because he has to leave empty-handed. Carrying cash may save your life. Make it a point to always have $100 on you to satiate a potential attacker, but keep it in a decoy wallet separate from your real wallet with any important documents or identification cards you may need.
If you need somewhere to keep your real wallet, stick it in your DIY secret agent boonie hat.
How to Survive a Kidnapping [Wired How-To Wiki]