And why would they be? It is pretty difficult to try to withdraw money, and that is even much more difficult to launder money, and if that is what you are asking for, let me tell you that you are going to go to jail if you do it.

Be careful, i dont know why the masses are always saying that bitcoin has been created for that kind of purposes, and in fact, it is false.

It is pretty difficult to do that kind of activities, and more with bitcoin, it is a mess, and everyone who do that kind of things need to pay taxes.