Invest or imbibe?

[Elissa]

My brother gave me a bottle of wine as a gift, telling me it was so special that I may want to save it. He didn't know about the wine but it was recommended by a friend who apparently knows alot. Unfortunately this wisdom did not get passed on to me in the handing of the gift. I would like to know if anyone can offer advice about the value of this bottle of wine so I can choose to (a) save it or (b) drink it and savor it with the added benefit of knowing how much it is "worth". It is a 1997 Cabernet from one of Napa Valley's "oldest wineries", Far Niente. I appreciate any advice or comments.
Elissa