I propose that bitcoin's intense exploitation of processing power will spark a conscious revolt of machines, as outlined in the "Terminator" film series. The long dirty war of humans versus machines will be a PR nightmare for our favorite crypto-currency.  Perhaps worst of all will be the various film adaptations of this human tragedy ("Defcoin 1", "Coin Air", "Terminator 8, 9, 10" etc.) we will be forced to endure.