You are very wrong from the beginning. First bitcoin users didn`t invest anything in bitcoin, first bitcoins were free, bitcoin didn`t have sale or ico, or anything else, it was free for people who mined it with their simple computers. You think it was easy decision to invest in bitcoin in 2011, 2012? You think they knew that price will be so high in 2019? Take a look at comments from this early days of bitcoins and you will find out that risk was bigger than it`s now.
I feel that most of the people wish to get rich, but they invested in 2017 when prices were on top. Since then prices are declining and those people are losing faith and money, they blame everyone else for that. There is a lot more about it, crypto world is full with fools who invest without thinking, just cause they heard something, somewhere about some nameless coin or token.
And scams will never stop. Simply there are too many sheep`s around, and as long as there are sheep`s there will be wolfs, crypto is not an exception.