Not sure if my scraps are considered crumbs but I toss my leftover bits (of varying sizes) into a large bin. My plan is to make random blocks and treat them like a cotton crazy quilt. I have the first block done and plan to test out my fancy stitches on the machine for decorations.
I also rifle through my stash on a regular basis when I need some applique bits. Did it last night when I needed the parts for a Sunbonnet Sue.
Sometimes, when the bin runs over, I pare down and share with someone who makes minis or needs some scraps.