I've used monopoly in the needle and 40 or 50 wt in the bobbin just fine for applique and for quilting.
The one BIG caveat with using monopoly as a quilting thread is that you never, ever want to use it for a baby's or toddler's quilt or object. Tiny fingers and toes can get caught and strangled by it.
I would also refrain from using it for any pet items as well, because toenails and teeth can get caught and paws and jaws/gums injured as a result