CoinShares counted more than $100 billion in AI and data-center contracts across public bitcoin mining companies this year1. Only $1.1 billion of that backlog billed as real revenue by August, the research firm found. Miners had switched on barely 550 of the more than 4,000 megawatts they promised to deliver.
Everyone reading those numbers draws the same first lesson. Mining companies leaning hardest into AI gained 500 percent in stock value over two years. Capriole Investments tracked the gain4. A business that scared off investors for a decade finally found its rescue.
Read the ratio again before you believe it. A hundred billion committed against one billion paid is still just a promise. Bitcoin mining has avoided this kind of bet until now: it rests on somebody else's power grid, built on somebody else's schedule.
The Block reported in March that miners could earn up to 70 percent of revenue from AI by the end of 2026. That share stood near 30 percent at the start of the year, CoinShares found2. Few readers asked the harder question. How much of that 70 percent sits inside contracts that still need power?
Bitcoin Miners' AI Backlog Hits $100B, Just $1.1B Bills, CoinShares Says Sept. 15, 2026
Disclosed AI contracts versus revenue actually billing, in billions of dollars
- Disclosed backlog
- Actually billing
Source: CoinShares [1].
Read the chart as a table
| Item | Disclosed backlog | Actually billing |
|---|---|---|
| AI and data-center contracts | $100B | $1.1B |
Josh Payne built his power and land skills inside Arkon Energy, a bitcoin mining company. He turned that experience into Nscale, an AI company backed by Nvidia3. Nscale signed Microsoft to rent 50 megawatts of computing power at a site in Loughton, England. The deal promised 23,040 Nvidia chips by early 2027.
Then the deal collapsed. UK Power Networks, which runs the local grid, told Nscale the site would gain enough power only in the early 2030s3. Microsoft walked away. Payne's company lost the one deal that would have proven its AI bet works on time.
Hut 8 shows the size of the bet under that promise. The Medicine Hat, Alberta, mining company raised $7.5 billion in project notes in the second quarter of 2026. Hut 8 is funding its own data-center build-out, CoinShares found1. TeraWulf carries $5.7 billion in debt for the same bet. Cipher carries $1.7 billion in senior secured notes.
Blockstream chief executive Adam Back reads the shrinking mining fleet as a healthy trade. “No, this is actually good for miners: if Hashrate falls profit margin increases. it's an arbitrage, with equilibrium when mining margin is the same as ai workloads,” Back wrote on X, answering Capriole Investments founder Charles Edwards4.
Back points to bitcoin's own code. When miners leave, the software makes the puzzle easier. Survivors earn more right away.
Edwards sees something else in the same numbers. The Capriole Investments founder wrote in August that bitcoin's defenses are thinning while every public miner chases AI money5. “Bitcoin's security is bleeding out. The current miner capitulation has been going for 3X longer. This is the result of every single public Bitcoin miner pivoting to AI,” Edwards wrote.
Ask the plain question a market like this always deserves. Microsoft lost little when the Loughton deal fell through, since it simply rents power somewhere else. Payne's company carries the land, the lease, and the chips still waiting for use. Ratepayers near any mining site converted to AI carry the buildout. The contract behind it may bill, or it may stay unbilled.
Bitcoin's own security rests on hash rate, the computing power that secures the network. Hash rate peaked near 1,160 exahashes per second in October 2025 and fell to a trough near 850 in February 2026, CoinShares found1. The rate climbed back toward 1,006 by Oct. 22, 2026, TokenPost reported6. Every exahash that leaves for an AI contract that stays unbilled is hash power the network loses for good.
Bitcoin's Hash Rate Peaked, Sank, Then Climbed to 1,006 EH/s by Oct. 22, 2026
Network hash rate in exahashes per second, October 2025 to October 2026
Sources: CoinShares [1]; TokenPost [6].
Read the chart as a table
| Date | Event |
|---|---|
| Oct. 2025 | Hash rate peaks near 1,160 EH/s |
| Feb. 2026 | Hash rate sinks to 850 EH/s |
| Oct. 22, 2026 | Hash rate climbs to 1,006 EH/s |
The verdict is plain enough to state outright. Bitcoin mining now bets on AI landlords paying their bills. That bet differs from one placed on bitcoin's own fee market. Watch whether Nscale and its peers turn one gigawatt of that four-gigawatt backlog into power that actually runs. That number decides whether this pivot built something real or just moved the risk.
Sign up for The Signal at cryptolately.com/newsletter. The Signal tracks crypto's people and its numbers every week, free. Ask which bitcoin miner's next earnings call turns its backlog into a bill. Then ask which one keeps waiting on power.
Sources
- Luke Nolan, "Bitcoin Mining Report – Q2 2026," CoinShares, Sept. 15, 2026, https://coinshares.com/us/insights/research-data/bitcoin-mining-report-q2-2026/
- James Hunt, "Bitcoin miners face breakeven pressure as AI pivot accelerates, CoinShares says," The Block, March 26, 2026, https://www.theblock.co/post/395259/bitcoin-miners-face-breakeven-pressure-as-ai-pivot-accelerates-coinshares-says
- Shaurya Malwa, "Bitcoin mining offshoot loses Microsoft AI deal as power delay stretches into 2030s," CoinDesk, Oct. 19, 2026, https://coindesk.com/tech/2026/10/19/bitcoin-mining-offshoot-nscale-loses-microsoft-ai-deal-as-power-delay-stretches-into-2030s
- Gamza Khanzadaev, "Adam Back vs. Charles Edwards: Is Miners' Shift to AI a Threat to Bitcoin?" U.Today, April 17, 2026, https://u.today/adam-back-vs-charles-edwards-is-miners-shift-to-ai-a-threat-to-bitcoin
- Benjamin Njiri, "'Bitcoin's security is bleeding out' - Why BTC miners are pivoting to AI," AMBCrypto, Aug. 6, 2026, https://ambcrypto.com/bitcoin-security-is-bleeding-out-why-btc-miners-are-pivoting-to-ai/
- Enna Lee, "Bitcoin Mining Hashprice Reached $36.55 Per PH/s on Oct. 22," TokenPost, Oct. 24, 2026, https://www.tokenpost.com/news/investing/39708