Bitcoin and other cryptocurrencies undoubtedly offer new opportunities for financial transactions. However, they can also be used for purposes of financial crime, such as fraud and money laundering. The absence of central control and the pseudonymous nature of transactions make cryptocurrencies appealing for illicit activities.
What do you think can be done to mitigate the risk of cryptocurrencies being used for criminal purposes? What measures should be taken?

Google FATF travel rule and MICA regulation 2023. There are already plenty measurements in taking place. And not just for cryptos, but fiat money / wealth too.
You on the other hand are spreading misinformation. Washing money trough crypto is harder than you think. It's way more efficient using shell companies and fiat money.