Well, collecting is a curious pastime. And valuation of collectibles is even more tenuous. Remember that collectors often don't really use the things they collect.
Investments are curious things.
You could play the stock market and not have half as much fun as you might when combing the swap-meet record bins at dawn for rarities. Then again, there are the collectibles that would seem apparently worthless to a real, hardcore gatherer of cultural history. One of my prized possessions is a simple, long-stemmed brandy glass from a pub on Mathew Street called Grapes. They were long gone by the time I breathed the air of that humble club, where the Boys used to grab a pint between sets at the Cavern. And I do use it, on special occasions, to toast special Fabs' related days.