an Antminer S7 run in the same place as an SP20 converts electricity nearly three times more efficiently. Venezuelas government has implemented price controls, which has created some of the lowest electricity prices in the world. It is much easier to run a mining farm in cool areas.
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Efficiency, a bitcoin miners job is to convert electricity into hash power. Price changes are factor, but it often makes more sense to simply purchase bitcoins if your goal is Bitcoin price speculation. GTX 1050Ti 15 Sol/s; GTX Sol/s; GTX Sol/s; GTX Sol/s; GTX 1080Ti 64 Sol/s; RX 560 7 Sol/s; RX 290 12 Sol/s; RX 580 16 Sol/s. Bitcoins price, or the purchasing power of one bitcoin, must be considered. Bitcoin price increases can cancel out difficulty increases if you measure your profits in fiat currency. Assuming the Bitcoin price remains the same, each block halving cuts miners profits in half. Difficulty, bitcoin mining difficulty measures how difficult it is to find a new block. Its important to compare both hardware prices and efficiency when purchasing a miner. Mining farms in hot areas will overheat and require large amounts of cooling fans. Expect mining to become more competitive as time goes.
Multiple calculators should be used ( 1, 2 and 3 options) to get the most accurate data. Block Reward, bitcoins block reward halves every 210,000 blocks. There have been fires at mining warehouses created by the excess heat. Bitcoin mining, unfortunately, isnt simple and there are a number of hidden costs and constantly changing factors.