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Bitcoin miner called $5.68 cost for 50 BTC a loss
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Sep 08, 2026
A Bitcoin forum post published on Sept. 7, 2010, has resurfaced 16 years later after an early miner described a projected $5.68 electricity bill for mining a 50 BTC block as “a net loser.”
The calculation was genuine, but it did not mean that spending $5.68 guaranteed the miner a block. The figure represented an expected electricity cost based on the miner’s computing power, Bitcoin’s difficulty and the average time needed to find a valid block.
The forum participant, using the name TTBit, measured a computer consuming 140 watts while producing about 2,200 kilohashes per second. A mining calculator estimated an average wait of 338.05 hours, or roughly 14 days and two hours.
Running a 140-watt machine for that period would consume approximately 47.33 kilowatt-hours. At $0.12 per kilowatt-hour, the electricity bill would be $5.68. The arithmetic in the original post is therefore consistent.
That conclusion reflected Bitcoin’s limited market and liquidity in 2010. It should not be read as evidence that the miner rejected a guaranteed 50 BTC payment.
Bitcoin mining was already a probability contest
Bitcoin mining has never promised a block after a fixed number of hours. Miners repeatedly hash block headers, searching for a result below the network’s target. Every attempt has a probability of success.
The 338-hour figure was an average derived from TTBit’s 2.2-megahash-per-second rate and the difficulty at that time. The miner could have found a block immediately, waited much longer than 14 days or never found one before difficulty changed.
This distinction matters because some retellings describe $5.68 as the fixed production cost of 50 BTC. It was instead the electricity cost associated with an estimated solo-mining interval. Hardware costs, cooling, internet service and equipment failure were not included.
Miners now commonly join pools, which combine computing power and divide income according to contributed work. Pooling does not change the expected economic return before fees, but it reduces the extreme variation faced by a solo miner.
A modern example shows that the lottery-like element remains. In July 2026, a small Bitaxe miner found block 957,382 and collected 3.1382 BTC, including fees, as crypto.news reported. Such outcomes are possible, but they do not establish normal profitability for small machines.
Bitcoin’s 50 BTC subsidy had little dollar value
The Bitcoin protocol initially awarded 50 BTC for each valid block. Its rules reduce that subsidy by half every 210,000 blocks, or about once every four years, according to the developer documentation.
Bitcoin had no deep or standardized market in September 2010. Historical price records vary because trading took place across small exchanges and informal transactions. Available records indicate that Bitcoin remained below $1 throughout 2010, with estimates commonly placing late-2010 prices between $0.10 and $0.30.
The precise market price on the forum post’s date is difficult to establish. That makes the user’s “net loser” description a personal assessment rather than a universally verifiable profit calculation. Selling 50 BTC could also involve limited liquidity and counterparty risk.
At Bitcoin’s current price of approximately $78,810 on Sept. 8, 2026, 50 BTC would be worth about $3.94 million. That comparison uses today’s market price and does not represent value that a miner could reliably obtain in 2010.
The network no longer issues 50 BTC per block. The April 2024 halving reduced the subsidy from 6.25 BTC to 3.125 BTC. Transaction fees are added to that subsidy, so the total block reward varies.
For a broader explanation of the issuance schedule, related coverage of Bitcoin’s halving explains how each reduction places fresh pressure on miners whose costs do not fall at the same rate.
Source>> Bitcoin miner called $5.68 cost for 50 BTC a loss
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