Crystafox is more stable company compare than other mining system. Company is 4 years old company. In this world best companies where investors says that these are best. like bitclub, genesis. But crystafox has maximum nodes to aquire blockchain transactions. More than 62% blockchain transactions handles by crystafox nodes. Crystafox is mining with F2pool and Slashpool system. Crystafox is situated in Ohio city, USA. approved by usa govt.
Crystafox is mining system. where you can start with minimum of 0.25 btc. and maximum as you want. Below than 1 btc they use upsw9 mining server and give stable income 3% daily and for 1 or above than 1 btc they use S3 mining system and give 4% daily. If you want this is option. if you want to use power mining then you can choose there are 4 power mining servers where they use S9 mining machine. you can get 6% daily maximum