You are safer without a knife

[Evil_Maniac From Mars]

I'm going to somewhat agree with Horetore for once, somewhat. If you arent prepared to kill the person with that knife, it's best to run and not start waving it around. Or better yet throw what they want at them and run.

For sure, I actually agree. If worst comes to worst, use it. Otherwise, give them what they want. Think about if you want to incapacitate the mugger over what you have in your wallet. If yes, then do so quickly. If not, give them what you have.