no new suggestions... just want to say how pretty it is!!!

Beginning of a table topper, wall hanging, in a special frame, would work.

I think I would use this a a center block in a quilt. Your block is just beautiful, you did an outstanding job on this. A table runner would also be lovely, but definitely display this piece of art. I don't think I would want to use it on a tote bag, per se, because of the extreme wear and tear it might get. This is too pretty, and I'm sure too much work to want to lose it to wear and tear in a short while.
I think you could really use just about any color you wanted with this black background. If you went with a quilt, perhaps using some of the colors in the applique as background colors for other bocks. Be sure to show us what you end up doing with this beauty.

Wow. It's sooo pretty.... How about a wall hanging?

very beautiful. thanks for sharing. great job

Your block is beautiful. I would go thru a book of blocks and see what catches your eye. I was thinking that some sort of Jacob's ladder might work.