Lazy newbies and greed old timers are prone to scammers they are really the best line in terms of victims as they are not doing their jobs to study and research.
The problem with those people who are keep being scam is they are not patient enough to deal with their assessment, they just keep pushing forward.
Being active and always pay attentions with news regarding to new styles of scam is very important, take time to read and lessen your chance become a victim.