I used cryptopia earlier, but now I'm using changenow. It's supporting fiat (usd/eur) and a lot of currencies (tether is listed there too). It's quite safe and anonymous service
Yes, because cryptopia cannot be accessed anymore and they still investigate their problem. I don't think that there is any good exchange as Bitmex, but I don't know because I used Bitmex for leverage trading although I don't always make a good profit. So far, I use Binance and Bittrex to trade, and it's not like Bitmex, and we could only trade as usual, but it's enough for me to search for profit.