While Bitfinex got hacked in the past and they definitely did some really shady stuff with Tether(USDT), I think we should treat all exchanges almost the same- with the assumption that they will be hacked someday. With that said, I'd probably trust Coinbase Pro or Kraken significantly more compared to Bitfinex, as I doubt the Tether controversy wouldn't be their last shady move yet. The move they did with the IEO just to have funds to back the Tethers was just something else.
therefore, all exchange are prone to hacker. And it can be hack anytime whether it is centralized of decentralized exchange platform.
But honestly, I never try to use bitfinex but I heard that it has a history of being hacked before, so it will be not safe for me or for sure
I will not be comfortable with if there was a background history which is bad. But this is just my opinion only.