I would this is a bad opinion you have chose. Please again start again your bitcoin trading path in Yobit, polenix and localbitcoins.com
Now price is moving to peak value again. Therefore, you can make bitcoins as a profit from the trading now. All will look into sell out their bitcoins for their needs and that make you to see the success in trading.
I wouldnt go at such a website, where the company doesnt care about their clients money, but instead the only think about commision from every trade.
Yes, poloniex so far is the best place when you can basically convert the coins into the other ones, without any risk and on great rates,thanks to high volume and mamy people present on this website.