TLDR
Public Bitcoin mining companies have collectively cut around one fifth of their hash power as they repurpose data centers for AI and high performance computing revenue.
- Public miners effective Bitcoin hashrate is down roughly 21%, while names like Core Scientific and TeraWulf now earn most of their revenue from AI and HPC colocation.
- This pivot weakens Bitcoins security budget at the margin by lowering network hashrate, as miners chase long-term AI leases that compete with block rewards for power and capital.
- Miner equities and ETFs such as WGMI increasingly trade like AI infrastructure landlords, so direct Bitcoin exposure is shifting toward BTC itself and spot ETFs.
Deep Dive
1. Hashrate Shift To AI
Recent earnings and network data show public miners cutting about one fifth of their aggregate hashrate as they pivot toward AI compute and colocation deals, according to Miner Weeklys analysis.
Core Scientific generated $136.7 million of colocation revenue in Q2 (83% of sales), nearly five times its $27.5 million Bitcoin mining revenue, while TeraWulfs HPC lease revenue of $31.9 million made up 71% of its total, versus $12.8 million from mining.
When you exclude growth outlier Bitdeer, the tracked public cohorts realized hashrate fell about 21%, confirming that a meaningful slice of industrial mining capacity is being redirected to GPUs and AI data centers rather than Bitcoin blocks.
2. Impact On Bitcoin Security
Over the same period, Bitcoins average network hashrate dropped from roughly 1,071 EH/s to 957 EH/s, a 10.6% decline, with public miners contracting faster than the network as a whole.
Lower hashrate modestly reduces the cost of attacking Bitcoin, and the article on Bitcoins security budget notes miners are already in a hashprice bear market two years after the 2024 halving.
The AI pivot tightens that security budget because the same power and capital that once chased block subsidies and fees are now competing against multiyear AI compute contracts; if price, fees and hardware efficiency do not improve, weaker operators are more likely to disappear.
for BTC holders, network hashrate and fee share matter more over time, as security depends increasingly on sustainable economics rather than ever-growing subsidy-driven mining fleets.
3. Rethinking Miner Stocks
The equity market is already treating miner names as AI landlords rather than pure Bitcoin proxies. A Valkyrie miners ETF, WGMI, surged 97% while Bitcoin fell 46%, driven by companies like Riot, Core Scientific and IREN signing multi-billion dollar AI leases, according to WGMI performance coverage.
Riot Platforms, for example, has a 20-year, roughly $9 billion compute deal with Anthropic for 191 megawatts at its Texas campus, alongside earlier agreements with AMD, so investors now value its total contracted compute and lease pipeline as much as its mined BTC.
As more miners follow this model, their stocks and sector ETFs will likely track AI infrastructure capex and data-center utilization more closely than Bitcoins price, while pure BTC beta increasingly lives in spot Bitcoin itself and spot BTC ETFs.
if your goal is Bitcoin price exposure, miner equities and miner ETFs now behave more like hybrid AI infrastructure plays, so it helps to distinguish them from direct BTC or spot ETF holdings.
Conclusion
Bitcoin miners shedding roughly 21% of their public hashrate to pursue AI and HPC revenue marks a structural shift in how industrial mining infrastructure is used and valued.
So far, the network remains robust, but the pivot tightens Bitcoins security budget and changes miner stocks into AI-linked data-center landlords rather than straightforward BTC proxies, making network hashrate, fee dynamics and AI lease flows key signals to watch.
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