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.
AtomicDEX uses atomic swaps, so users control their private keys at all times, a trade either goes through to completion or gets reversed, so you control your coins and never have a counterparty. Afaik the atomic swap tech is based on timelocks and multisig.
As for liquidity AtomicDEX allows for adding api from centralised exchanges, so market makers can pull liquidity from binance etc, and take a cut on the spread. If you want 100% security you can pay the market makers small commission for basically using his/her centralised exchange access, but without any kyc or security risk for yourself from 'not your keys not your coins' deposits.