I used to trade Bitfinex but many days ago I left Bitfinex because I don't feel better to trade there. I didn't like their trading interface. Yes, there is no issue about withdrawal but I can't feel good to trade mostly their trading features. I think Kucoin is more good than the Bitfinex trading platform. However, choice is a personal matter. But I shall say, we need the best trading platform for our fund safety.