And, even anonymous systems like monero can be subject to preference overrides. A government could say that the only legal monero is accompanied by a Keybase.io signature linking your identity to the transaction…
That's why white market crypto usage makes little sense. Using a permissionless money (Bitcoin/Monero/etc) in a permissioned way defeats the entire purpose. And regulations/requirements on the white market are pretty much garunteed to become more onerous over time.
Bitcoin/Monero is inherently black market money.