How on Earth are you able to not use that thing!?! I could never just collect knives. Believe me that's not a sly "I'm better than you." Clearly, you've already won. But seriously, there would a faded outline on my all my pockets in the shape of that knife right there.
I use it. It, as well as most of my knives, get pocket time, however, only light use for all but one of my TC Barlows. I never cared for blade embellishments until I saw the TC Barlows and I like the blade embellishments on them a lot. I don't do anything with them to jeopardize that. Other than the Days Work below, only light duty for the remainder.
I have plenty of old knives with honest patina that I can stick in my pocket if I feel the need and many times I do have another when one of my beloved Charlows is in tow.
It is not like one can change their mind and go back to like new, once the embellishment is gone. Also - they are not easy to come by. I have spent a LOT of time on the forums and peaking under many rocks, so to speak, to find my TC Barlows. I remember that and I wish others would remember that. That knife above I spent months trying to buy and aggravated way too many people and when the opportunity finally did come along, I had to give up another precious and rare Charlow in a trade to get that antique amber.
When I was younger and did not have a lot of knives, I used the same knife daily and just took care of it. Times have changed and I now enjoy having a cherished knife in my pocket, nearly a different selection every day. My feelings on using my most cherished knives is: why on earth would I want to patina up my whole collection?
With that said, my advice to all knife lovers is use your knife how you want and enjoy them the way you like.

and another old knife I left "as is" that I like to carry often: