I've try to contact Bittrex but for some reason they ignored my messages. Please send me our GRK amount and a screenshot of that amount. I believe there is a problem with sending coins out of Bittrex, but they don't answer, so i will swap it myself.

I've contacted allcoin.com to add profitcoin, yes, it is a small exchange but that doesn't mean that it cannot move higher.

Address for destroying coins is : GfmrHVs9ftRCDf3Q4B8ARwL2KQ2NJw1HUt

If it doesn't work sending from Bittrex, then screenshot or so