I lost all faith in bittrex in 2017 when they introduced KYC rules without warning, and no grace period to withdraw. They basically stole millions of $ from account holders all around the world. Poloniex at least gave warning.
Best exchange option for bsd is AtomicDEX, no need to pay fees, just add the coin ourselves to a fully legal decentralised exchange with no kyc and no risk of getting hacked.
Decentralized exchanges are good choices, because they usually ask low listing fees or give free listings; and no KYC-requirement is another plus point. However, the main disadvantage of decentralized exchange are their low volume; most of them have very low daily volume, compare to centralized exchanges. I don't understand why you claim decentralized exchanges , or AtomicDEX in particular, has no risks of hack. Would you mind explaining more about that, please.