I assume you're talking about blatantly illegal transactions, like trafficking or drug deals, but if that's not part of someone's threat model, is Bitcoin still reasonable private?
As in, if we remove state-level actors from the threat model, is Bitcoin still safe enough? I'm more interested in not getting doxxed for my choice in VPN, email service, etc if I choose to run for office, and Bitcoin is accepted by enough places to be useful enough.