Vitalik is spinning a false dichotomy. Saito (http://saito.io/arcade http://saito.io/arcade) has already solved the 51 percent attack. The mechanism used (usin

Vitalik is spinning a false dichotomy. Saito (http://saito.io/arcade http://saito.io/arcade) has already solved the 51 percent attack. The mechanism used (using fee collection as work) eliminates the profitability of collusion while still rewarding cooperation.