Having to think of it, I think there is a possibility, but it would be done indirectly rather than directly. Money laundering is the process of making dirty money or illegally obtained or produced money seem to come from a legal and legitimate source. It can be done in many ways, and I think the possible practices that can be tied up with the cryptocurrency market is if an illegally obtained money would be used to buy and invest in the cryptocurrency market. I actually think that that would be a smart option to divert the attention of the authorities because once money is converted into cryptocurrency holdings and be dealt with, it won't have the paper trail  that most money-related processes have; however, if the authorities would track the person who personally used the money, then there can still be a chance of identifying the perpetrators.