Walks with gun, I can see where that would make sense. I'd love to live in the countryside someday where I can walk my own woods. I'd probably keep a muzzleloader ready to grab (unprimed), too. I'd want to discharge regularly, though, so as not to leave powder for weeks on end without cleaning.
As for now, I have no good reason to keep a loaded muzzleloader around the house. It would be problematic for me to just discharge it (I'd have to drive out some country road, and fire it off into the ditch while no cars were around). I've had this issue before, on the few occasions I've keep my DGW flintlock loaded over night when I hunted a few days in a row. Never having had a chance to shoot a deer, I had to pull the PRB with my rod. Then I discharged the powder in the backyard so as not to make too loud a report in the neighborhood. (I probably could have just washed the powder out with warm water).