I wonder how long it will take until there is a market for IP addresses. I suspect once such a market is in place IPv6 will not see widespread adoption, since most IPv4 addresses are not really used.
do you know if goldman sachs or some other financial entity has created an investment vehicle that I can use to speculate in the market with?
I suspect you're joking, but the old timers really don't like IP speculation. It took them years to agree on the current pseudo-market because they had to figure out how to keep out speculators.
At which point the routing properties of IP will be destroyed (all addresses in a given /16 or /24 routing through the same link helps router performance a lot). I think at that point you'll get a real ISP push to switch to IPv6