Same here they are under DDOS when I accessed this website it's always offline for me. Should I withdraw my fund out? I'm confusing.
If you feel uncomfortable , you can withdraw to your own wallet and wait for Poloniex fully established.
But for me this situation are not strange as long as they keep updating what actually happened we can still trust them. Ddos attack frequently happened we can still trust them, but once they say they are hacked we must start worry