There seems to be a number of ways to deal with your "new" guitar:
1. Learn to play it and enjoy having a geat guitar. Allthough you won't learn to appreciate it fully for another 5-10 years...
2. Sell it. Since you won't be playing it your self, it's a shame to keep a great instrument hanging on a wall to no use. It is a musical instrument and thus it was meant to be played.
3. Keep it in the familly for sentimental reasons. You never know if you'll want to take it up at a latter point in life, or you'll have kids who will want to play it.
4. Keep it as an investment. It would be a shame not to keep such a valuable piece just because you don't want to play it.
I would go with 1 or 2 and since I play classical guitar myself, I would definitely go with 1.
Also, I don't think it's fair to compare a guitar to a painting. A guitar was meant to be played. It has a lilfe span just like a human. When it's all new and fresh and just off the hands of the luthier it's much like a cild; no one knows exactly how it will turn out, what it will sound like in a couple of years. If it's a good guitar made of good materials it will mature and grow into something nice and, just like a human, it will grow old and die. It will still be playable of course but the big, full, beautifull tone will change for the worse. This is the nature of wood. The purpose (destiny, if you will) of a guitar is to be played.
This, however, is not the nature of a painting. The colours will change a bit over the years but that's all. It's purpose is to be looked at.
Sorry if I got a bit carried away