Bitcoin’s rebound stalled below $4,000 as mining economics deteriorated

Bitcoin remained below $4,000 on December 26, 2018, after a holiday-period recovery failed to hold. CoinDesk’s contemporaneous market report placed its Bitcoin Price Index near $3,762 at approximately 13:22 UTC. The weakness mattered beyond the chart: international coverage published on December 26 was also digesting GMO Internet’s decision, formally disclosed one day earlier, to stop developing, manufacturing and selling cryptocurrency-mining machines.

Together, the records captured the two sides of the 2018 contraction. Token prices had fallen far enough to damage investor confidence, while the same decline was undermining businesses whose economics depended on valuable block rewards, competitive hardware and inexpensive electricity.

A recovery met resistance

Bitcoin had moved back above $4,000 during the preceding week, but that level did not become durable support. The December 26 CoinDesk assessment described a retreat below the threshold and weakening short-term momentum. That was a market observation, not proof that another decline had to follow.

A later aggregated daily table maintained by StatMuse records a December 26 open of $3,819.67, a high of $3,893.36, a low of $3,769.86 and a close of $3,857.30. On that dataset, the close was $37.63 above the open, a calculated increase of about 0.99%. Those figures differ from CoinDesk’s intraday reading because the records use different instruments, observation times and aggregation methods. Cryptocurrency trades continuously, so a “daily close” depends on the selected venue or index and its day boundary.

The defensible conclusion is therefore narrow: bitcoin remained below $4,000 during the December 26 measurement windows, even though one daily series shows a modest open-to-close gain.

GMO’s filing exposed the industrial pressure

GMO Internet’s board resolved on December 25, 2018, to record an estimated consolidated extraordinary loss of ¥35.5 billion related to restructuring its cryptocurrency-mining business. Its filing divided that estimate into approximately ¥11.5 billion for impairment and other costs in the in-house mining operation and approximately ¥24 billion associated with the development, manufacture and sale of mining machines.

The company attributed deteriorating profitability to declining cryptocurrency prices, a global hash rate that rose beyond its assumptions and mining-machine depreciation. For hardware sales, GMO cited weaker demand, lower selling prices and an increasingly competitive market. It consequently said it would no longer develop, manufacture or sell mining machines.

The filing did not announce a complete exit from mining. GMO said it intended to continue operating machines after restructuring, review the business’s revenue model and seek cleaner, less expensive electricity. In an investor-call summary dated December 25, management said continued operation depended on revenue exceeding electricity expense after the impairment reduced depreciation costs.

What December 26 established

The verified records support an interpretation of pressure rather than a claim of direct causation. Bitcoin’s price decline contributed to the environment described by GMO, but the filing also identified company-specific investment, depreciation, receivable-transfer and competitive factors. A single market session cannot explain a ¥35.5 billion restructuring charge.

December 26 nevertheless supplied a clear snapshot of the crypto winter’s transmission mechanism. Bitcoin’s attempted recovery had stalled below $4,000, while a publicly traded technology company was abandoning mining-machine sales and writing down mining-related assets. The market weakness was no longer only a change in quoted token prices; it was affecting capital allocation and operating plans inside the industry.

No later price recovery, financial result or corporate decision is needed to establish that event-day conclusion. The surviving evidence does not establish that $4,000 was permanent resistance, that every miner faced GMO’s cost structure or that the company’s estimates were final.