http://invest7xci3j4tfs37zeyxylwmhfnl2nvfbf6geos4xxeh3ejmzntfid.onion/bitcoin-adder/index17.html
A 51% attack is a financially suicidal proposition from the miners' perspective. When Ghash.io, a mining pool, reached 51% of the network's computing power in 2014, it voluntarily promised to not exceed 39.99% of the Bitcoin hash rate in order to maintain confidence in the cryptocurrency's value.