Bitcoins were used in crime and money laundering from long time now. There are lots of people who use the anonymity and fast transaction to their advantage. Its really hard to track them down with different rules for different countries.
Bitcoins were utilized as a part of wrongdoing and illegal tax avoidance from long time now. There are bunches of individuals who utilize the obscurity and quick exchange further bolstering their good fortune. Its truly difficult to track them down with various guidelines for various nations