First and foremost i do not believe the data presented by CMC as the volumes given by the exchanges are not accurate. Second of all i consider Tether as a centralized coin which will blow up any time. They lied before that they are pegging every coin with the united states dollar but then they were forced to reveal that it was not the truth. Even if you are seeing huge volumes in Tether does not mean it can be trusted, it is just a disaster waiting to explode in my opinion  .