Cryptocurrency exchanges are always risky to deal with. Even though these companies make it easy to access cryptocurrency, getting funds out can be a big hassle. It appears some people have issues getting money out of Poloniex, whereas others do so just fine. It is a bit unclear as to what is going exactly, though. Unfortunately, these are not the first woes for Poloniex users either.
More specifically, there are a lot of complaints about withdrawals getting stuck. Several complaints have been received related transactions “Awaiting Approval”. Other users can request a withdrawal and get the funds in less than an hour. It is unclear what is going on exactly. More specifically, there is no method to the madness of withdrawal issues whatsoever. In some cases, people are waiting for their funds for over a week now. That is unacceptable, regardless of the reasoning behind it.
Source/ read more: http://www.newsbtc.com/2017/06/24/users-cant-withdraw-funds-poloniex/