It is quite obvious what their position is on this. They want Crypto currencies to be full regulated, before they give it their full stamp of approval. In a regulated environment, owners of Crypto currencies can be identified and funding of illegal actions can be minimized.
Unfortunately for them, this type of regulation does not work. Look at the regulations that are applicable to firearms. The criminals still use unlicensed firearms to rob and kill people and official are bribed to license illegal firearms.
Bitcoin can still function without regulation, so this will not stop criminals from using it for illegal activities. Just look at the drug trade for instance and see how much cash is used to buy and sell drugs.