Yes thats true. Cryptocurrency can be used for money laundering. In fact four primary areas of criminal activity lend themselves to cryptocurrency: tax evasion, money laundering, contraband transactions, and extortion. This is the reason why many countries are against cryptocurrencies. But I think thats the fault of people and not Bitcoin that they are using this wonderful technology for such illegal motives
The use of crypto have become a way to facilitate these kinds of criminal activities. Its sad that bitcoin has become associated to these and has given it a bad name. Criminals have taken advantage of the anonymity of bitcoin and the fact that its decentralized. It would also be hard for the police or investigating bodies to trace so its preferred by the criminals.