Bitfinex just announced they will completely stop servicing customers in the United States within 90 days and gave everyone notice to withdraw funds. I recommend if you have any funds on Bitfinex to transfer them immediately, my thoughts on why not to keep your coins on an exchange just got stronger they can just stop servicing customers at any moment. I just barley opened an account on Bitfinex so I could buy Iotas, I can't believe they stopped servicing customers in the U.S. Here is the link:
https://www.bitfinex.com/posts/216