You know, it's a fact that we all love our knives here on a knife based forum. It's taken for granted that we're the obsessed knife knuts that have a Cult Worship relationship with the edged tools.
BUT...a very large three letter word, things ha ve to be kept in a certain perspective.
Fact, the knife makes a p--s poor self defense tool. When Sam Colt invented the first reliable repeating handgun, and John Moses Browning perfected the small self loading pistol, the knife took an instant backseat. The Bowie knife faded in both popularity and size. Now we're in the 21st century, a knife is still a handy thing to have in a pocket. But...that word again, if you plan on using a knife for self defense, go get a gun.
Sean Taylor was a pro NFL football player. He was big, fast, and strong. I highly doubt there are many chest beating keyboard commandos here that are his equal. Yet, because of an arrest, Sean Taylor couldn't have a gun in his house. When a couple punks broke into his home when he and his girlfriend were home, he was defensing himself with a large machete.
The punk that was armed, shot him with a 9mm in the leg, and Taylor bleed to death. Here was a big fast powerful NFL guy at close range in a bedroom rushing the guy with the gun, and he was killed by a skinny little punk with a gun. Range was about 10 feet. So much for the 21 foot drill and the delusional people that think if they are close enough that they will prevail over a gun.
You like daggers, fine. Collect them, mount them for display, fondle them like your "precious" to your hearts content. But don't delude yourself that you will do anything but get yourself killed using one for a defense weapon. You ain't Conan The Barbarian, or Rambo. Hollywood movies are fantasy stories, just that. If you are really serious about self defense, go down and get the paper work, take whatever course you have to get certified, pay for the finger printing and mug shot, and carry a gun. And then practice. Practice a lot. Or just carry some pepper spray. Leave the medieval weapons to history. At the battle of Agincourt the French army outnumbered the rag tag English by at least two to one, and heavily armored knights at that. But the English were archers. The French brought swords to a projectile fight and got slaughtered in spite of outnumbering the English and being more heavily armed. There's a lesson there.
Walk down the street with a nice dagger and it could actually create the wrong scenario. Some little gang banger could see it, want it, and stick a beat up Davis .380 in your face and order you to 'give it up.' Or he could just shoot you and take it.
Think very carefully before you go standing out by doing something less than smart.