"Sorry, we're unable to connect to the server at the moment.
Please try again in a few minutes."
Run. Get your stuff out while you can.
They have an update in their twitter account that a ddos is happening.
https://twitter.com/Poloniex/status/861777032279142404No need to worry in cases like this. Things like this happens in all exchages and they still managed to stay and provide a good service.