everyone just needs to be more careful and avoid being greedy cause many have been scammed due to greed both ignorant and experienced crypto enthusiast.
Greed and ignorant are the main reasons while people fall victim to scam. When you have that urge of making money too quick whatever offer you see would attract you to make a try of making money. When people also fails to make research on things they know nothing about but too quick to give a try t see if it will work they will always end up into scam. There are newbies that have never been scammed before this is because they are not greedy and they pay so much attention to things just not to make mistakes.
You are absolutely correct, greed is the major thing that make people get scammed most times, I have a friend that always like taking risk and then there is this Ponzi scheme that came out some years ago, this my guy has been making profit from the Ponzi scheme and what he was doing was that any profit he makes, he will invest back all and then it get to a points where they where changing the withdrawal criteria and this my guy still went to invest everything at the end of the day the admin lock the group and they were not reachable again and this my guy invested over $1k he made from the Ponzi scheme, simply because he wants more.
Is obvious that most of this scamming cases we have being hearing in this forum both outside the forum all happens as a result of being greed, just like as you said about your friend who got scammed. Of course that's how most of this ponzi scheme works, I also remembered when a friend ask me to join one of those Ponzi scheme. Even before he introduced me to that platform I have already saw it in the media, then I tried to convince him that the project happens to be scam he refused just because he have tested the profit. And guess what happened......the guy later lose all his money both his profit everything just vanish as a result of over aiming.