i guess it could change but right now i don't see cas or crowley existing in the show without the other. they've been paralleled to each other so much. they seem to like the angel, demon, and human thing?
Yeah, probably true. I don’t think Crowley’s story is as interesting as Castiel’s but it’s still part of the show. As a friend said -Crowley, Rowena and Cas are probably in it till the end.