In reply to FesteringSore:
A guy in Scotland where we've sometimes stayed collects whisky. A couple of years ago we were there and I spotted in his display case a bottle of Port Ellen from a single numbered cask and said: "Oh, my wife bought me a bottle of that, same cask number, for my birthday about 25 years ago".
Him: "Do you know how much she paid for it?"
Me: "Wouldn't have been much more than £30 because back then we limited main presents to around that"
Him: "What did you do with it?"
Me: "Drank it of course, it was delicious!"
Him: "Thank you"
Me: "Why?"
Him: "Well my bottle's worth about £700 now, thanks to you and others like you"
I reckon I had the best deal, as I had several nights savouring a wonderful flavour. All he can do is watch its "value" increment (or decrement, if the whisky bubble bursts) and know that if he were ever to want to actually taste it, the bottle's "value" would plummet to zero as soon as he cracked the seal.
Post edited at 13:38