What an important subject, thanks @firepower!
Maybe the focus should not be talking about "regulating crypto".
Maybe the focus should rather be on regulating Ponzis and other forms of exploitation in the monetary world as a whole.
Maybe Cryptos should rather just be welcomed into this arena an improvement on the existing monetary system.
Exploiting the weaknesses of one's fellow beings is a disease in its own right, that has absolutely nothing to do with what cryptocurrency is all about.
On the contrary, proper application of cryptocurrencies is a form of defense against improper corruption of the freedom and security of everyone.