That article is complete rubbish and shows very little understanding of the situation. About the only thing they had right was that Cox is contracted for another 2 years after this one. They're just baiting clicks for desperate Crows fans who've been at the bottom of the ladder with little prospect for excitement.
Freo would never be interested in trading him, let alone for a paltry second round pick. That's ridiculous. We have little other cover there and he's taken over from Pearce as the general down back, setting up our play and marking anything loose.
He also loves Perth, has a tonne of close mates at the club and is set for a stint in the top half of the ladder. There's literally no reason for him to leave and there's no 'carrot they can dangle' big enough to do it. Even salary wise, if they were to offer a million for a full back, that would be plain dumb. In doing so, they'd need to offer their first round picks this and next year plus some extra on top.
It just isn't gonna happen and is ridiculous to suggest.