And this is the sort of thing that kills Bitcoin (long-term). At some point you are faced with sustaining the security of your network at a cost of doing real w

And this is the sort of thing that kills Bitcoin (long-term). At some point you are faced with sustaining the security of your network at a cost of doing real work, if silicon manufacture were ever that scarce. Worse, if Bitcoin is the dominant currency... paying for hardware is, a weird Ouroboros of power.