I agree with Rich
I personaly do it because I like holding The emplements that lead the course of history in the many directions it has been.
I also collect things other than swords that I feel have been instremental in my heritage, that to me are also works of art like guitars and also many other things.
Funny Story
I bought a Spanish American War Fore and Aft Hat with its insignia and in the original Carrying case and my girlfriend said "What are you going to do with that?" and I replied
"I am going to look at it"
Those of us that are, as Rich said collectors ,will understand how heartfelt and profound such a simple reply was
Edited to say My girlfriend and I have been on again off again for 4 years so much more to say I agree with Rich