"crypto" is not used much for this purpose. The state goons themselves claim that even in their fakenewspapers. Theres enough articles out there.Such a system can be used for both good purposes and, indeed, bad ones, much like how crypto has been and is being used. It's the ultra-criminals who ruin it for the rest of us, those who use the systems to sell their crappy drugs, trafficking, and other activities that harm innocent people.
Why one might wonder? Bc the alternatives are well established and very easy to use.