I also cannot withdraw my BTC. I sold some RVN here and the BTC withdrawal has been stuck for 48 hours, it is just "submitted". I can cancel it, but the value of other coins is extremely high and all withdrawals do not work right now. I am very hopeful that this is not a scam. It is a 1 man operation so it is not crazy for something like this to happen, but there are also lots of red flags. I can only hope that we will all get a happy ending soon.