I am not a fan of coinsbit. Never traded there maybe I don't like the exchange that much because of some order patterns I usually see. I hope his resignation won't have a negative effect on the exchange stability. Let's be reminded again to never leave asset on centralized exchanges without private keys.
I think that it is generally not worth keeping your cryptocurrency on exchanges. Exchanges are primarily created in order to trade cryptocurrency. even such a mega-reliable exchange as Coinsbit!