all the very smart people know it's a combination of speculative bubble and pyramid scheme; they're just divided between those who think it's fine as long as th

all the very smart people know it's a combination of speculative bubble and pyramid scheme; they're just divided between those who think it's fine as long as they can be part of the group who get to make money off it, and those who find the entire thing repugnant or too akin to gambling.