Right now I hate what GM is doing. Buy contracts now to mine in Feb 2018. This isn't funny. Locking your money away is a waste right now, even if you think that Bitcoin is a bit without volume. I can see it scratching the $9000 mark in 3 weeks time. Bitcoin is becoming more and more popular and the support will increase to see a bullish movement. Investing in GM right now is wasting money. The other contracts are too expensive for the returns.
They need to work on that a little bit.