Probably this is another way of doing scam. There are many scammers in cryptocurrency because they take advantage on it. Since this is not regulated and protection is not quite high like no authorities has been tasked to monitor the events and happenings of cryptocurrency because we wanted as much as possible without the interference of the government that could also defeat of its purpose being a decentralized. Anyway, I do believe that one day cryptocurrency will go strong and that include the strengthening of security system.