The truth is that, no matter how old a scam is, there'll always be people who will be naive and ignorant enough to fall for them, some are simply just pushed by greed into putting their money into these scams. Honestly, I've seen a lot of these play out so many times, and i wouldn't let it happen to me first before i know this is a scam, regardless of how authentic it is, as long as it sounds too good to be true.
In crypto, we not only see new user getting into trap of scammers but it's surprising that even experienced users who have spent time in the market and are well informed about crypto scams also fell prey to scammers. The reason is only because there is no shortage of greedy people in the market. No matter how much we educate others about scams, as long as greedy people continue to exist in the market scammers will continue to get good business.
In different contexts I would say that instead of greed it is more the existential decision to think that most people aren't going to cheat on you. Everyone makes that decision more or less consciously, and while being extremely paranoid has its cost, having the contrary worldview and trusting everyone, although it has its advantages, has its cost too. But I agree that in crypto, most of the times, is not a case of naïveté, but greed.