Better not to support this site anymore. Once it happened already, the vulnerability of the site is there. And the possibility that it can be hacked again is always there. Even though bitfinex is doing hard to get back the trust of the people still better to be safe than to be sorry in the end. Take the risk if you want, but we warned you.
I personally don't believe Bitfinex was hacked, but opinions on this might be different. However, no matter what has happened, a fair amount of its major traders are still making use of Bitfinex because its interface and such is more appealing to them when it comes to marginal trading and all that. But still, their trading volumes are still not recovered, and that's mostly due to the fact that a certain number of traders have left that exchange. That being said, I wonder where they might have gone as I don't see a serious increase of volume on other exchanges which might indicate that Bitfinex's old traders have gone there.
OP - I wouldn't make use of Bitfinex, but if you think it's the right exchange for you, and you make a decent amount of money, then just continue your business there. But don't forget what has happened a few months ago.