Interesting way to think about #bitcoin PoW on a global per capita basis:
The Bitcoin network currently has about 1 Zettahash/second and there are 8.23 billion people on earth. That's 125 gigahash/second per person. That's well below even the simplest of home miners. If you run a Bitaxe Gamma (500 GH/s) you're covering the hashpower for 4 people and if you have a Bitaxe Gamma (1.2TH/s) you're providing 10 people's worth of hash power.
