Nice hash is a scam mining company , they gave me two payouts before asking for more money.I lost about $45,000 to them and I referred 4 people.When they closed my account i reported to the police who did nothing.months later i hired a security expert and he got my refund in 10 working days.If you are a victim reach me on sarhmiz56(at)gmail,com and I would refer you to them.Do not give up