Your Bitcoin’s Biggest Miner Just Admitted AI Pays Better Than Mining BTC
MARA's CEO says the same electricity now earns more running AI than mining Bitcoin — here's what that shift could mean for the network you hold.
If you hold Bitcoin, the machines that keep the network running are owned by companies chasing the best return on every watt of electricity they buy. And according to Fred Thiel, CEO of Marathon Digital (MARA), one of the world’s largest Bitcoin miners, that return is now bigger if the power goes toward artificial intelligence instead of mining blocks.
Speaking on a July 23 interview with Natalie Brunell, Thiel said the economics have flipped: the same unit of electricity earns more revenue running AI workloads than it does mining Bitcoin. That’s a striking admission from the head of a company built entirely around Bitcoin mining infrastructure.
Why AI wins the numbers game
Thiel put real figures behind the claim. Building out capacity for Bitcoin mining costs roughly $1 million per megawatt, he said, while AI infrastructure runs $10-15 million per megawatt. That’s a huge upfront gap, but AI data centers make it back through something mining can’t easily offer: long-term, low-risk contracts with major tech tenants.
Those stable AI leasing deals let operators secure investment-grade credit ratings and cheaper financing, according to Thiel. Bitcoin mining loans, by contrast, are riskier bets tied to a volatile asset, making capital harder and more expensive to raise. In an industry where power access — not chip supply — is now the real bottleneck for growth, that financing edge matters a lot.
What this means for your Bitcoin
Before anyone panics: Thiel was clear that MARA isn’t abandoning Bitcoin mining overnight. The company plans a gradual shift, continuing to mine BTC until its AI data center construction actually needs the full power capacity. Eventually, he suggested, mining could become more of a way to soak up excess electricity than a primary business line.
For everyday Bitcoin holders, this matters because miners like MARA are part of the machinery that secures the network and processes your transactions. If more of the industry’s biggest players quietly rotate power capacity toward AI over the coming years, it could eventually slow hash rate growth or change who’s willing to keep mining when margins get squeezed. It doesn’t threaten your coins directly, but it’s a trend worth watching if you care about the health of the network underneath your holdings.
Thiel also touched on why he still believes in Bitcoin itself, even as his company chases AI dollars. He described BTC as primarily a store of value rather than a everyday currency, valuable as protection against inflation and geopolitical instability rather than as a payments tool.
A pattern bigger than one company
Thiel traced MARA’s roots back to Marathon Patent Group, recalling early operational headaches like paint residue contaminating mining hardware, before the firm moved from a hosted, asset-light setup to owning its own power sites outright. That history mirrors where he thinks the whole industry is headed: companies will either need to become power producers themselves or lock in tight partnerships with electricity suppliers to stay competitive, whether they’re mining Bitcoin or hosting AI chips.
He also flagged a real-world obstacle slowing everyone down: NIMBY-style opposition to new data centers, plus long build times for new power plants — including small modular reactors — that can’t keep pace with AI’s ballooning electricity demand. Thiel described the recent flow of investor money away from Bitcoin and gold and into AI stocks as a normal swing of market cycles, not a permanent verdict on crypto.
Read more: Bitcoin Miners Are Sending Less BTC to Exchanges — Here’s What It Means for You
