Bitcoin is less anonymous than cash. Eg if I take $10000and buy drugs from a drug dealer unless he has my phone number, name or other identifying things or unless we are caught right then and there that transaction will be almost 100%anonymous. But if we use Bitcoin there is a record. And it is forever. True the police would still first need to realize that Bitcoin was used to make this transaction in the first place, and then get access to the device used to make the transaction, if the device is encrypted then they would have to find out if they can break the encryption which as we all know might not be possible, and then if they achieve this then they have to get possibly a password or some other kind of unlocking key for a cryptocurrency wallet, which if it's not from a exchange and especially a local exchange will be very difficult maybe even impossible. Let's put it this way. Crypto doesn't give you anything cash can't if you do it smart.

Privacy is a human right. You do not have to ask for permission to use your human rights to their fullest. And if you want to guarantee your rights encryption