[Not for Sale] PlayOnline Edition Aluminum Binder

Metal PlayOnline Beta Tester Exclusive Binder.
It was affectionately known at the time as the Killing Binder or Strongest Physical Attack Binder.
The inside contains only clear pockets and nothing else.
I kept the binder itself, thinking it might be useful for something.
Although I never read or used it, keeping it with its original cover, there are some scratches where the internal rings interfere with the main body during storage. I don't see any particular scratches on the surface, but there might be some cloudiness.
How about using it for daily purposes, separate from your collection?