Bitfinex just announced that it is immediatly curtailing the services provided to U.S. customers and within 90 days will no longer serve the U.S. market. Their official announcement puts it plainly:
“Over the next 90 days, we will be discontinuing services to our existing U.S. individual customers.”
At press time, Bitfinex had the highest volume on the USD/BTC trading pair of any exchange.
https://cointelegraph.com/news/breaking-news-bitfinex-fires-us-customers