A Bitcoin Miner Is Borrowing $3.5B to Build AI Data Centers, Not Mine BTC

TeraWulf, a company that started out as a bitcoin miner, is lining up $3.5 billion in debt to expand an artificial intelligence data center in Kentucky — and barely any of that money has anything to do with mining bitcoin anymore. According to Coin Edition, the financing is being led by Morgan Stanley and will fund the buildout of TeraWulf’s “Justified Data” campus in Hawesville, which is leased to AI firm Anthropic under a 20-year deal.

If you hold bitcoin, or shares in a bitcoin miner like WULF, this matters more than it might seem. It’s a clear sign of where the mining industry’s money and attention are actually going in 2026 — and it isn’t toward digging up more BTC.

What TeraWulf is actually borrowing for

The $3.5 billion raise, expected to include a mix of leveraged loans and high-yield bonds, would be TeraWulf’s first time tapping the leveraged loan market, Coin Edition reports. It builds on two earlier debt raises: $3.2 billion in October 2025 and $1.3 billion in December 2025. TeraWulf’s CFO, Patrick Fleury, said lenders from the company’s earlier $250 million revolving credit facility could join this new round too.

All that borrowed cash is going toward expanding the Anthropic-leased site into roughly 400 megawatts of AI computing capacity. The lease itself is expected to bring in $19 billion over its initial 20-year term, with two five-year extension options on top. Construction is happening in phases, with initial capacity coming online in the second half of 2027 and the full site finished by early 2028.

Why a bitcoin miner wants to be an AI landlord

Here’s the plain-English version of what’s driving this. Mining bitcoin has gotten a lot less rewarding since the 2024 halving cut the reward for mining a block in half, while network hashrate and difficulty have kept climbing — meaning miners are burning more electricity for less bitcoin. Renting the same power and buildings to AI companies instead can be far more profitable, with margins reportedly above 80% compared to traditional mining, according to industry reports cited by Coin Edition.

AI hosting contracts also tend to run 10 to 20 years with well-funded corporate tenants, which gives miners something bitcoin mining rarely offers: predictable, dollar-denominated income locked in for years rather than revenue that swings with bitcoin’s price and mining difficulty.

TeraWulf isn’t alone in making this pivot. Coin Edition notes that publicly listed miners, including Core Scientific, IREN and Hut 8, have collectively secured more than $70 billion in AI and high-performance computing contracts as they diversify away from pure mining.

What this means for your bitcoin

For everyday holders, this trend is worth watching rather than worrying about. Bitcoin’s security still depends on miners dedicating computing power to the network, and if major miners increasingly funnel new investment and physical infrastructure toward AI instead of mining rigs, it’s a reminder that the industry supporting bitcoin’s backbone is changing shape.

It doesn’t mean bitcoin mining is going away — TeraWulf still mines BTC alongside its AI business — but it does suggest that some of the biggest names in mining now see AI hosting, not bitcoin rewards, as their main growth engine. That’s a business story as much as a crypto one, and it’s one reason WULF’s stock moves can sometimes feel disconnected from bitcoin’s own price swings.

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