I strongly disagree with your statement. Bitcoin is not completely anonymous in nature, we can say it pseudo-anonymous. Everything can be seen through the public ledger but it is hard to identify which account belongs to whom. That's where it looks like anonymous. But bitcoin is not at all a breeding ground for criminal activities. Money laundering, drug trafficking and terrorism financing was always there before bitcoin ever existed. So it makes no sense to call bitcoin as a breeding ground of such illegal activities. Probably bitcoin has given them a new platform to make the financial transactions for such activities, but it is certainly not a breeding ground. Such kind of crimes existed since the history of mankind, bitcoin did not give birth to this issues. Watch before your draw a conclusion.