So, next time when someone tells you that Crypto currencies are used for scams, please highlight the fact that most scams are still being done under the nose of the regulated financial industry. 
Most reasonable people would agree. Calling them out this way, however, is a logical fallacy called Appeal to Hypocrisy, which ultimately leads nowhere.
I feel like it's more important to highlight that crypto is, and can be used for so much more. Majority of people who believe that Bitcoin is only used for scams, or even that Bitcoin itself is a scam, only know of Bitcoin as an investment vehicle. You're more likely to get through a person if you don't antagonize them, and you could even educate them on the actual subject itself in this case.
