If you don't want to have problems with the law, make transactions with privacy, because each country's policy is different. In my country, crypto is allowed so I have no problem when making these transactions on local exchanges.
Although taxed, because the government has allowed it, I feel safe.
I understand that there are legal differences from one region to another. Therefore, when in a supportive system and conforming to the laid down regulations one feels secure. That stated, you still need to be prudent with the sharing of your data during the times of transaction. Cryptocurrencies are legal but that doesn’t make everyone associated with it deserving of a trust. Of course I still believe that personal details should be concealed not with a view to evasion of the law but for such things as data manipulation or fraud amongst others. Legality offers predictability that is complemented by the concept of privacy to give security and protection.