I started saving selvages because someone in my friendship group was using them to make wallets. She wanted everything I could give her.
Now, I keep them in a glass jar and they look pretty on the shelf.
I use them to tie up projects into a bundle, play with the cats, mark out a space on the design wall. I'm thinking of using them to make a purse.
My DH also uses them for whenever he needs a string or cord.
Now my jar never seems to get full-too many uses for them.