How Does Difficulty Affect a Miner’s Profitability?

Mining difficulty is a measure of how hard it is to find a new block. As difficulty increases, miners require more computational power (hash rate) to find a block and earn the block reward.

This means a miner's share of the total block rewards decreases for the same amount of hashing power. Higher difficulty directly reduces the expected number of coins a miner will earn over time.

Consequently, operating costs like electricity and hardware amortization become a larger percentage of the reduced revenue, decreasing profitability.

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What Is the “Birthday Problem” in Cryptography and How Does It Relate to the Risk of Hash Collisions in SHA-256?
How Do Changes in Mining Profitability Influence the Network Hash Rate?
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How Does Increasing Transaction Fees Affect a Miner’s Revenue When Difficulty Is High?

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