| I sympathize! I considered running a miner in 2012, with the positive side effect of heating my office. Decided I didn't want to listen to the fan noise for negligible returns. > it cost about $1 in energy to mine $1 worth of BTC This is the crux of it (we may be saying the same thing!). There is no 1:1 relationship between mining cost and reward on a single block. If there was, no one would do it, because they do not win every block. And all blocks you compete on cost the same, win or lose, but of course the blocks you don't win, pay zero. There's a (very) roughly 1:1 relationship between a miner's overall cost and reward, averaged over many blocks. If reward increases (BTC price spikes), more competition comes online and your win frequency drops. So if the question is "how much energy (cost) did it take to mine this specific $2MM block", the answer is closer to "The average block reward divided by the winning miner's win frequency", which is e.g. 5% for one of the bigger miners (I did not check this block or this miner). This was a high reward block, so the real miner cost might have been more like $50K. Less for energy alone. But it's like the guy who buys a $10 lottery ticket every day. He needs to win a few hundred dollars per month to maintain the habit (gambling addiction notwithstanding!). Today he got lucky and won $700 on the $10 ticket. |
Ah, I see what you mean.
I think I've been mixing up my costs. When I wrote the original comment, I was thinking about the total energy cost for mining this block, i.e., the energy cost of all the nodes that worked on it. But the truth is, I have no idea about the economics of BTC mining. I was just being facetious :)