I agree, if you're turning millions then if these government agencies want to find you then they will and VPN won't help. But I think for traders with small profit even with the use of VPN will probably go unnoticed, unless that particular country is set to get rid of crypto users (hard to believe but some leaders out there can be very opinionated).

To close off, VPN usage for trading or anything crypto related is well known, and for some light touch on the subject as to which ones are more suitable for certain exchanges this is a light material you can read, right here .