Seems a silly question but actually it is not. Items like the ones obtained from Prey Hunting Points are attached to your account (you cannot sell it to anyone, like a Store item), but in other cases, you can receive some decoration in Tibia and they are not attached to your account (like the Ravens that you get from Bewitched event points).
During Orcsoberfest, as far as I know, people didn't know that decoration stuff that you get from Festive Points were attached to their accounts and this generated frustration for some players... Said that, what about the Golden Outfit Display? Is it attached to your account or not? This is important because it opens the possibility to sell or buy this item.