It depends on how far you want to go. The cost per transaction would be interesting in real terms. What's the comparison between: - Manufacturing physical cu

It depends on how far you want to go. The cost per transaction would be interesting in real terms. What's the comparison between: - Manufacturing physical currency / Manufacturing the hardware to mine coins - Cost to run POS systems in retail outlets / Cost to run bitcoin network - Cost to run global fiat exchanges (i.e. wallstreet) / Cost to run global bitcoin network Obviously you could drill down as far as you wanted. I'd imagine it would be quite difficult to draw up such a detailed comparison though.