Debate over Bitcoin’s true circulating supply has resurfaced after cryptocurrency analyst Timothy Peterson argued that roughly 1,500 BTC are lost every day, implying that the number of coins that can actually circulate may ultimately remain below 14 million. The claim stands in sharp contrast to widely cited supply figures from market data providers, which generally place Bitcoin’s circulating amount at more than 18 million coins.
Peterson, identified in the source material as the CAIA Manager at Cane Island Alternative Advisors, said the scale of daily losses is significant enough to outweigh the 900 bitcoins mined per day at the time. His argument is that nominal supply and economically available supply are not the same thing. While the blockchain can show how many coins have been issued, that figure does not account for coins that are permanently inaccessible due to lost keys, inaccessible wallets, or other unrecoverable circumstances.
The idea of “irretrievably lost” bitcoin
To support his position, Peterson pointed to a research note published by Cane Island Alternative Advisors earlier in 2020. In that five-page document, the firm introduced the term “irretrievably lost” to describe bitcoin that is effectively removed from economic activity. According to the report, these are funds that are no longer part of any economy because they cannot be transacted, and the cost of recovery is greater than the value that could be obtained even if recovery succeeded.
This framing matters because Bitcoin’s base-layer transactions are generally irreversible. Once coins are sent and access credentials are lost, there is no central authority that can reverse the transfer or restore ownership. As a result, users who misplace private keys or lose access to old wallets can permanently lock coins out of circulation. The article also referenced a well-known example: a wallet believed to contain 69,370 BTC that had reportedly remained inaccessible despite years of efforts by hackers attempting to crack it.
Cane Island’s estimate: available supply near 13.9 million
Using its own methodology, Cane Island Alternative Advisors estimated that since 2010, about 4% of Bitcoin’s available supply has been lost each year. Based on that approach, the firm concluded that the current available supply was only about 13.9 million coins, well below the 18.3 million total supply figure being publicly cited at the time. In other words, the report suggested that approximately 28% of all bitcoin had been irretrievably lost.
That estimate is far more aggressive than many public-facing supply trackers, and it naturally drew attention because of what it implies for Bitcoin’s scarcity. If the number of truly spendable coins is materially lower than the headline supply figure, then Bitcoin’s effective float in the market may be far tighter than commonly assumed. That, in turn, would have implications for liquidity analysis, valuation models, and long-term supply-demand narratives.
Prior studies were cited, but criticism followed
To reinforce its conclusions, the Cane Island team referred to earlier work on the subject, including a 2014 study by Ratliff and research by Chainalysis in 2017. Peterson later responded to critics by saying that if one did the math from the Chainalysis report, the implied rate of losses as of December 2017 was roughly 1,900 BTC per day. On that basis, he argued that his own estimate of 1,500 lost per day was actually the more conservative figure.
Even so, the article noted that the research note did not provide direct links to the Chainalysis report being referenced. That omission left room for skepticism, particularly among Bitcoin community members who questioned both the assumptions and the extrapolation behind the estimate.
Some critics pushed back on Peterson’s September 14 social media comments about Bitcoin’s shrinking supply, with one observer arguing that a daily loss figure of 1,500 BTC sounded too high. Another user challenged the logic of the research by saying it seemed to imply that over a sufficiently long horizon, all 21 million bitcoin would eventually be lost. While that interpretation may oversimplify the methodology, it highlights the discomfort some market participants have with linear assumptions applied to a changing network and user base.
Why the debate matters
At the center of the discussion is a simple but important distinction: issued supply is not necessarily the same as accessible supply. Bitcoin’s protocol defines a maximum supply cap, but it does not guarantee that every coin ever mined will remain usable. Coins can disappear from practical circulation if their owners die without sharing backup credentials, if storage devices fail, or if seed phrases and private keys are lost forever.
This distinction has long been recognized informally in the Bitcoin ecosystem. Early mining activity, old dormant wallets, accidental destruction of keys, and inaccessible addresses have all contributed to the belief that a meaningful portion of the supply is gone for good. What remains contested is not whether bitcoin can be permanently lost, but how much has already disappeared and how that figure should be estimated.
That uncertainty helps explain why supply estimates can vary so widely. Market trackers often focus on the number of coins mined minus provably unspendable outputs, while researchers trying to estimate economically usable supply may include behavioral assumptions, wallet dormancy data, or historical patterns of loss. Different methodologies can therefore produce very different conclusions, even when they start from the same blockchain data.
A contested number, but a broader point of agreement
Although Peterson’s specific estimate remains controversial, the article suggested there is at least some broad agreement on a narrower point: Bitcoin’s true spendable supply could be lower than the commonly reported circulating figure. That does not automatically validate the 13.9 million estimate, but it does reinforce the idea that headline supply numbers may overstate what is actually available to the market.
For investors and analysts, that distinction is more than academic. If the pool of liquid, spendable bitcoin is smaller than public dashboards imply, then Bitcoin’s scarcity profile may be stronger than surface-level data suggests. On the other hand, any attempt to quantify lost coins with precision must grapple with uncertainty, incomplete evidence, and shifting assumptions over time.
In that sense, Peterson’s claim has done less to settle the matter than to spotlight a recurring question in Bitcoin research: how many coins exist on-chain, and how many of them can still realistically be used? Until stronger evidence or more widely accepted methodology emerges, the answer is likely to remain debated.