Indeed. CBDCs will become the end of an era for privacy. Governments and central banks will gain greater control over people's lives like never before. When that happens, criminals will have no choice but to rely on privacy-oriented cryptocurrencies in order to stay afloat. They will be forced to learn how to use crypto in order to continue with their illicit activities in the mainstream world. My guess is that governments will ban the usage of privacy coins because of their anonymous nature. But the decentralized and open source nature of crypto, will allow anyone to get access to it via the use of other methods. This will enable an "underground economy" that's truly unstoppable by third parties.
Nonetheless, Fiat will continue to be the top currency of choice for criminals because it's stable, anonymous, and widely used in the mainstream world. This will be the case until governments and central banks introduce CBDCs to the world. At least, we won't have to worry about crypto being "outlawed" in a few years from now. The switch from physical cash to digital cash will not happen overnight. It's a process that will take decades before it becomes a reality. As long as crypto has the "green light" from mainstream governments, there should be nothing to worry about. The more people use crypto legitimately, the higher the chances of being approved by the government will be. It's best for criminals to stay away from crypto as possible for the sake of the entire industry. Just my opinion