Many in the existing Bitcoin community scoffed at the idea that the blockchain concept could be separated from the currency. As they viewed it, the currency, and the mining of the currency, was what gave users the incentive to join and power the blockchain. Given that a blockchain could be taken over and subverted if an attacker controlled more than 50 percent of the computing power on the network, a blockchain was only as secure as the amount of computing power hooked into the network.
