Summary : The Bitcoin pool Ghash.io has in the last 24 hours had more than 42% of the entire Bitcoin mining power making them the biggest Bitcoin mining pool in the world. If they receive more than 50% of the mining power they will be able to double spend their Bitcoins and possibly destroy the Bitcoin value (so called 51% attack). The Bitcoin threat that we all should be aware of is whats called a 51% attack on the Bitcoin-system. Once a network or a group of people, like GHash.io, gets more than 50% of the Bitcoin hashing rate/power (means that they mine 50% or more of the Bitcoins at a present time), they receive advantages in the network which they might misuse for personal gain and profit. We posted an excerpt from the Bitcoin Wiki Weaknesses about what an 51% attack is this summer: An attacker that controls more than 50% of the networks computing power can, for the time that he is in control, exclude and modify the ordering of transactions. This allows him to: Reverse transactions that he sends while hes in control Prevent some or all transactions from gaining any confirmations Prevent some or all other generators from getting any generations Double spend Bitcoins This may be sensationalism but it has certainly got the BTC community worried. Full article here - **(clearnet)** http://www.cryptocoinsnews.com/2014/01/09/warning-ghash-io-nearing-51-leave-pool/ Bitcoin Miners, Step Away From GHash.IO