I bought some BTC on Coinbase last night and had it sent to Poloniex. I know the BTC wallet address was accurate. Its still pending 11 hours later and doesn't show up in the Poloniex deposit/withdrawal history. Any clue on how long BTC transactions are taking?
I think the problem is on poloniex,
Many people complained they had problems with deposits, withdrawals and support ticket in poloniex
So I suggest do not use Poloniex if you want to trade
