The capital appreciation of a listed building can be high, but is not always high. "it depends"<p>So from a non-altruistic PoV it may, or may not turn out to be a sound investment irrespective of it's utility as a venue right now.<p>As a venue, it may be profoundly attractive, induce all the right moods for visitors, and be sellable for service (weddings, funerals, videos..) so supplement income.<p>Have known occupants of listed buildings in the UK, stately homes. Mostly, tenants who got them off the National Trust on peppercorn rent for putting up with the perpetual damp.<p>If they are seeking investment funding having a villains lair (is there a dungeon? is it in working order?), or a mansion, might project the right kind of message to people with money who want to be altruistic. If they want to deal with poor people, less so.