Good point, I am stuck in the middle on this one, technology is growing at such a fast rate, perhaps parabolic now if you consider the last 10,000 years? At some point in the near future the costs will be a fraction of what they are now, we won't be able to keep up with the speed of technology itself, renewables will power everything, the hardware running the network will be a hundred and eventually a million times faster. Of course there are other alternatives like POS so going forward we will see which system the market decides.