I guess fraudulent is not preventable but you can minimize being a victim if you will be very vigilant in your actions towards your investments. Doing more research before engaging to something which includes money will reduce the chances of being a victim of fraudulence.
fraud I think it has become part of the crypto currency because there is no legal force that protects it so we ourselves must be able to choose which ones produce and which ones are fraudulent
indeed, until now the fraud has not been removed from crypto. because indeed until now there has been no law that enforces the fraud is removed, and for those who commit the fraud will be punished, all of which have not been made and have not been established by law. so it's difficult to avoid a fraud.
this happens because there are still many who have not legalized cryptocurrency, so the government has not been able to make laws governing it, so this is like being a land for fraudsters