Some excanges announced about support of Bitcoin Cash very late, when lot of people were already cashed out their bitcoins from exchange. I'm not exeption in this case. I left only $10-20 on several exchange in btc. When bch was credit, I was able to sell it at high price.
Do I regret that I didn't had all my btc on exchange? Definitely no! Because safety of bitcoins for me is in the first place, more important than to get free bch airdrop and risk to keep all btc on exchange.