I was just reading the thread about the most useless chemical element ( http://boards.straightdope.com/sdmb/showthread.php?t=599617 ), which got my mind to thinking that maybe a get-rich scheme would be to corner the world supply of an element, like Lutetium mentioned in the chemical element thread, that is useless now, and when people do find a use for it, they would have to come to me, and I would have them at my mercy! Bwahaha.
My next step is to figure out what would be the easiest thing to corner the world supply of, if I was a super-villain on a budget?
It should be something that can’t be easily produced by other people, e.g. if I tried to corner the world supply of hot dogs, someone else can easily make more hot dogs. It should be something that other people might want some day, e.g. if I corner the supply of dirty socks once worn by Arnold Winkelried, no one would care. And it should be something that I can do on a small budget.
What could there be? I was thinking of some kind of rare stamp, but that would probably require a big budget. Gold would be a good one but I could never afford it, and I don’t have a bunch of henchmen to steal it for me like Goldfinger.