Yeah, sadly some "investments" in future classics don't work out well at all. A VRod was probably the worst HD to keep in a box. You need a fanboy bike in there, not one of the best bikes they made that most of the HD crowd hated."Boys, come to the house on Sat night, look at my new cardboard box. BYOB."
A friend of my dad bought a Cadillac Allante and kept it in a garage as a future classic. How could you go wrong with a low-production american luxo-cruiser with a Pininfarina body right? Ooof. Like a stone. Inflation adjusted to 2019 dolllars they cost ~$90,000. One owner, low mile, garage kept examples are trying to get ~$5,000 to 20,000 now.