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Economist Steve Keen, best known for warning of the 2008 global financial crisis well before it hit, has reignited a long-running debate in crypto by arguing that Bitcoin (BTC) will ultimately converge to ‘zero’. His claim is less a short-term price call than a broader critique of what he sees as Bitcoin’s dependence on energy abundance, its friction with climate policy, and its incompatibility with the way modern economies finance growth.
Keen, an Australian post-Keynesian economist who has consistently targeted mainstream assumptions about credit and debt, built his reputation by highlighting the risks of excessive private leverage in the mid-2000s. That track record has helped his latest comments travel beyond the usual investor echo chambers, landing instead as a macro-level warning about how financial systems behave under resource constraints.
At the center of Keen’s argument is the idea that Bitcoin’s proof-of-work security model is structurally ‘energy intensive’ by design. Mining, he contends, is an arms race of computation that becomes increasingly difficult to justify as energy becomes more expensive or politically constrained. In an environment where electricity grids face tightening capacity, higher marginal costs, or stricter emissions rules, he argues that a network requiring large and continuous power input could struggle to sustain itself.
He also points to geopolitics as a catalyst that could expose Bitcoin’s sensitivity to energy shocks. Under scenarios such as supply disruptions, heightened Middle East tensions, or a broader commodity squeeze, Keen suggests governments and markets would prioritize energy allocation toward essential industry and household consumption—pushing discretionary uses like mining down the list. In that framing, Bitcoin’s security budget is not merely a market variable but something that competes with real-world energy needs.
A separate layer of his criticism focuses on monetary design. Because Bitcoin’s supply is capped, Keen argues it carries a built-in deflationary bias that can encourage hoarding over spending and investment. In traditional macroeconomic terms, a currency expected to appreciate can discourage consumption, complicate debt dynamics, and create pressure on borrowers whose liabilities remain fixed while the purchasing power of the unit rises.
Finally, Keen challenges Bitcoin’s status as ‘money’ by emphasizing the absence of state backing or institutional guarantees. Without an issuer responsible for stabilization, lender-of-last-resort functions, or legally enforced redemption, he argues Bitcoin lacks the foundations that historically underpin widely accepted currency regimes—leaving it reliant on market belief rather than an enforceable monetary architecture.