As Hive account@ceedeez stated, you'll definitely want to get your EOS tokens off of the DEX (guessing you have open.EOS which is an OpenLedger issued asset). While O/L is a huge part of the Bitshares ecosystem, I wouldn't count on them to handle anything for you. If you are trading, sure you can leave them on DEX or other exchange, but if you are simply holding, get them into a registered Ethereum wallet.