ビットコインのマイニング利益はゼロになったかも、との試算。NY連銀ブログ。 

ビットコインのマイニング利益はゼロになったかも、との試算。NY連銀ブログ。 

, we discussed bitcoin miners’ incentives to undertake a 51 percent attack given the current condition of the bitcoin market. We also speculated that high profits and free entry would cause more miners to enter the market, driving marginal mining profits to zero in the long run. Since then, the price of a bitcoin has declined over 40 percent and both the hash rate and the difficulty level of the bitcoin mining problem, which adjusts automatically to changes in the hash rate, appear to have leveled off. Our most recent calculations suggest the long run may have arrived. The following chart illustrates the path of aggregate bitcoin mining profit since September 2014, using current estimates of chip efficiency and updated electricity price data from the recently published 2014 report of the International Energy Agency. The gold line shows our estimate of the aggregate daily p...

Full article: http://libertystreeteconomics.newyorkfed.org/2015/08/entr...

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