Most art collectors buy a painting, sculpture, ceramic pot, furniture or whatever which has a artistic value or beauty to appreciate it more at any time they want or may be for the purpose of investment. For appreciation you do not have to possess it. You may appreciate it more before possessing it actually. Like a photographer, I imagine, he or she looks at an object and its surroundings very carefully from several different angles, distances, light and many other conditions to make his or her photo being taken in the best way. In a way he or she is in a process of appreciating an object under different conditions before taking a photo. Once a photo or photos taken all these activities (actually of appreciating a thing or thongs) cease.
In Chine people appreciate the moon during the evening and night on the mid date (15th) of the month of August of the lunar calendar. Nobody cannot possess the moon but people can appreciate the beauty of the moon. How much they appreciate depends on the person.
AAG