Supply and Demand. ----------------------- Only 12,000 Birkin Bags are made per year. Hordes of rich women pay up to $100,000 per bag. There are less than 100 bottles left of the 1947 Cheval Blanc. Each one goes for up to $15,000. (I have had one) There are about 3,000 Andy Wharhol 1967 Marylin prints remaining. They go for $250K and up. Rarest of all, there are less than 5 Million Bitcoin in all private hands. They go for 105K last I checked.