The problem is that the majority of people, investors, traders (most especially, newbies) come into the crypto currency space with the mindset or rather, expectation of getting rich overnight.
This can be avoided if they just tell to themselves that there is really no way to become rich fast unless they win the jackpot in a lottery which only happens to a very few people. People that fall into scam are usually in desperate need for money. Even if they know to themselves that it is too good to be true, they still invest on it hoping that it would change their life.
Get proper education and clear direction, know what you are doing at all time and be patient.
Many might have the education, but not having a clear direction and lack of patience is one of the reasons many (especially newbies) end up loosing their hard earned money to scammers.
There are some professionals that I know that still fall into scam because the scammer is good in his social engineering skills. Some scammers will make you feel that they are legit at first then once their investors feel confident on putting their money to them, they will slowly make excuses that will end in taking your money.