If they don't already, the various prediction market websites should offer bets on unsolved mathematical conjectures (buy "true" or "false", pays out 50:50 if the conjecture is unresolved by some cutoff date, or proven independent of ZFC)
Advantages:
Insider trading provides novel source of income for mathematical research.
People will get to argue about whether knowing a tautology can count as "material non-public information"















