IQ does not matter for when greed overtakes a person which is why so many people fell for the bitconnect scam. They believed that they could make so much money in such little time.
Ironically, those who invested in Bitconnect are probably going to invest in more scams again, without doing their research and confirming whether or not those are scams, apparently not learning their lesson. They are 'token holders' though, so what does that imply about their IQ?