The per-block rewards paid to bitcoin miners are set to be cut in half, from 6.25 to 3.125 BTC, later this month. The network’s fourth halving event presents a headache for even the best-resourced mining firms, but it could make thin margins even thinner for those running mining setups at home.

For miners, the formula is simple: If the halving drives up bitcoin’s price, their investment pays off. Otherwise, small miners could be left with dormant ASICs, energy bills and little chance of breaking even. 

Read more: How the halving could impact bitcoin’s price

Some at-home miners laid out the stakes in the r/BitcoinMining subreddit.

“I personally need it at 70k for my operation to…

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