It's not decorating. This is a 215SF studio in Brooklyn - that's the "parking included" feature of the listing. And he's paying an extra $1200 a month for the privilege.
That's more like the weight of a small car. The motorcycle probably weighs in the ballpark of 400-500 lbs.
Still far too much weight to hang from the (assuming) 2x4 wall studs behind the drywall there. Also probably quite a hassle to get down when you need to ride it and when you come back home to re-mount it on the wall.
Tons of old Ducati super sport motorcycles end up as decorations that will never touch the street or track ever again because maintaining them makes no sense...
Even if it wasn't on the wall, seeing how it's an old Ducati, no.
Edit for those who don't know: Maintenance on old Ducati, especially sports bikes with desmo engines, is a total pain in the ass and is so expensive that it just doesn't make sense to ride the bikes. Thousands of dollars every 10k km kind of expensive...