There already is, it's called De Beers. It's exactly because of the artificially inflated price that the mining practices are damaging.
Step one - find a rare mineral that at this point has value close to zero. It is rare but worthless.
Step two - obtain monopoly on mining it or control it as much as you can (buy spots with dense occurrence, etc)
Step three - throw money at important and powerful people (such as Spielberg, so that in his new movie today's Marilyn Monroe is wearing your ore as a form of very high luxury) other media stars, politicians etc.
Step four - continue with excellent PR until enough wives or soon-to-be wives come to their soon-to-be husbands and request them to update their luxury status by buying your ore.
Step five - collect trillions of dollars across the globe, by tightly controlling your ore and its harvest.
Edit: step six - rinse and repeat for 50 years getting yourself even wealthier.
Maybe not exactly billionaires, but
If a man really wants to make a million dollars, the best way would be to start his own religion. :)
Various sports. Formula One, for instance, is the epitome of racing despite there being plenty of other ways to race cars.
Bottled water. Competes with a spout that everyone has several of in their home, yet people still pay up for it.
http://www.cc.com/video-clips/acaxis/key-and-peele-the-heist
It's a skit by Key & Peele describing a genius plan for a bank heist. I won't ruin the punchline by going any further.
If they had to hand it over to the Customs Officers those holes would suddenly be less attractive.