I have an Antminer S9 ASIC miner , and I have visited this , but I want to know how difficulty may impact my profitability in the future. I would also like to estimate break even costs.
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The higher the difficulty, the more work it takes to find a block. As difficulty increases, your profit will decrease – Raghav Sood Oct 19 '18 at 17:44
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related: https://bitcoin.stackexchange.com/q/118/5406 – Murch Oct 19 '18 at 18:09
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Source: http://bitcoin.sipa.be/speed-lin.png
The difficulty growth has been slowing down over the years, but in the last year it still has about quintupled.
Source: http://bitcoin.sipa.be/growth-10k.png
The general formula for calculating profitability is elaborated on How much Bitcoin will I mine right now with hardware X?.

Murch
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