The main idea behind the creation of Bitcoin is, that the system of virtual money that are beyond the control of any central force. Bitcoin system works based network communication between computer users that will confirm each transaction and the issuance of new money. However, in reality it is not entirely true. GHash.IO which is a joint consortium of various Bitcoin miners, now control more than half of the mining activity, a phenomenon which by some circles assessed would be a threat to the system.
 
Bitcoin is the creation of new money through a series of mathematical puzzle solving is increasingly dominated by a few groups of miners known as a collection. Various miners and then unify the computing power of sharing successful Bitcoin obtained. Combining the power of computing to give greater opportunities to solve mathematical puzzles in every Bitcoin transaction verification. GHash.IO is a collection of the most successful miners who controls nearly 51% of the computing power of Bitcoin mining (hashing power), theoretically has enough power to cheat the system.