How secure is Poloniex? They have a lot of BTC and BTS there, would be a shame if something happened...
They are secure enough that they havent been able to be hacked yet, even with their btc wallet being like the #4 bitcoin wallet in existence, and have hundreds of millions of eth. I am sure many hackers have tried.
Of course, that is no guarantee they are secure. All it means is they are on a higher level than all the shitty exchanges that got hacked.