I can see that being a millionaire already is (somewhat) correlated with being less vulnerable to scams, but if you were designing a rule to protect the vulnera

I can see that being a millionaire already is (somewhat) correlated with being less vulnerable to scams, but if you were designing a rule to protect the vulnerable, is that really what you'd come up with? The first thing to come to mind for me, besides taking a test, is for people to show they can make it as a blackjack card-counter -- seriously, wouldn't an official investor-accrediting poker league, even, do a better job of sorting out or educating the marks and freeing up much more of the population to invest? If we have to deal with this problem by prior restraint at all.