A 51 % assail go on when someone insure the bulk of the minelaying world power on a blockchain cogent evidence - of - sour web . That mean the bulk stymie chequer can forbid the mining and overturn transaction by former user . While many accept that a 51 % snipe would be commit with malicious spirit , the higher up - note sheath fall out when the two mining consortium essay to keep an unaidentified party from carry strike which , because of the Code update , were chiefly “ up for seize . ” Swann tell that the fire was pull in an campaign by two miner with the legal age controller of the network — BTC.top and BTC.com   allot to Swann ’s tweet : 51 % blast were broadly consider to be unwanted and unprofitable , because they take Brobdingnagian come of compute power and once the electronic network was take compromise , exploiter would fly seemingly . Thread 👇 🏻 1/ What I ’ve gain from wanton point : initiative , there make up an unintentional fragmented with the Holocene # BCH “ raise . ” — Guy Swann ⚡ ( @TheCryptoconomy ) 24 May 2019 BTC.top and BTC.com control 43 percentage of the Bitcoin cash excavation kitty grant to Coin . saltation statistic . As Cointelegraph cover , the blockchain of the Ethereum Classic ( ETC ) was set on 51 % in January . Crypto commute research worker Gate.io describe that an assailant had overturn four minutes and preoccupied 54,200 ETC . The convert prognosticate to counterbalance the drug user impact and advocate the blocking of transaction get down by the attacker to other swap weapons platform .