Can these tokens available on HitBTC be withdrawal ? Or what are being traded are just IOU?

I’m not worried about my Tezos ico investment at all.  Either they’ll build the platform and we’ll get our tezzies and they will be worth considerably more than the ico price or the lawsuits will prevail and we’ll be returned our btc/eth which is worth a lot more now.  There’s no way the Breitmans can just disappear with the money.  They’re not some random people in Russia or Eastern Europe.