I think Digital Currency like Crypto isn't getting much popularity because of these Scammers.They are one of the most strong reason why Government's aren't showing interest on Crypto Transections.
This may not really aplies to the reasons why Cryptocurrency is places on a ban hold by some countries, although i gree with how digital businesses have been misunderstood by many for scamming, but i think some countries are having related issues with Cryptocurrency due to its decentralization and non Government regulated entity. They believe everything to be under their auspices whereas crypto is a game changer of it all.