Do not send any bitcoin (that you want back!) to Poloniex. I sent Bitcoin to Poloniex and traded it for Monero. I then went to withdraw and my transaction has been "Awaiting Approval" for 10 days now.

They have not replied to any of my support tickets for 10 days (#227706).

Poloniex is not processing withdrawals over about $1000. $1800 held for 10+ days, zero replies to any tickets. There's not even a way to cancel the transaction.

My account is supposed to be able to withdraw $2000/day but do NOT believe Poloniex! That's absolutely not the case!