The explosive wave began on August 14th when Bitcoin++ posted Todd's presentation "Tail Emissions and Demurrage," delivered on July 23rd in Toronto. Comments on social media did not yield subtle analysis of long-term incentives. They resulted in a familiar verdict: inflation under a different name, disguised as an engineering idea.
Todd has not uncovered a new issue. He has been promoting the concept of "tail emissions"—a fixed amount of new coins per block—since at least 2022. The reaction to the video showed how little room remains for those proposing to rewrite a rule that buyers consider sacrosanct. After Todd's latest remarks, a heated debate erupted on social media, and critics tore his idea to shreds.
"'Tail emissions' and 'demurrage' are just academic euphemisms for endless inflation and a wealth tax on savers," lamented one X user in their account. "Bitcoin's entire value proposition rests on absolute, unchangeable mathematical scarcity: 21 million, full stop. Once you introduce endless coin dilution to subsidize miners, you're just recreating fiat central planning with extra steps."
"The fee market and L2 settlements will organically fund security. The hard cap of 21 million is non-negotiable."
The Problem for Bitcoin's Future Miners
Miners expend electricity and use specialized hardware to assemble Bitcoin blocks. Their revenue has always come from two sources: the block subsidy, or newly issued bitcoins, and the fees users add to transactions. One of these sources is shrinking on a fixed schedule.
Each Bitcoin halving cuts the subsidy roughly in half. Around 2140, it will reach zero, and mining will be funded solely by fees. Todd believes that a system based exclusively on fees could lead to uneven revenue distribution: one "rich" block might tempt a large miner to reconsider the recent chain of blocks instead of continuing it.
This maneuver is called a chain reorganization, or "reorg." It is not a magic button that will destroy Bitcoin the moment subsidies disappear. Payments can wait for more confirmations. But the uncomfortable part is who gets to play this game. A miner with massive hash power can attempt strategies unavailable to a garage miner or a decentralized pool.
This is the crux of the "security budget" argument, stripped of Todd's presentation's slick slides. Proof of Work does not exist to "produce" coins. It rewards participants for maintaining the ledger's operation and makes fraud expensive. If fees do not cover the cost of this work, a concentrated mining industry gains more influence over the settlement process.
Todd's Proposed Compromise
Todd wants a small reward in each block after the subsidy vanishes. The stated advantage is a predictable minimum income for miners. The price is constant issuance, which critics call "dilution," as each newly created coin alters the relative claims of those who already own bitcoin.
In his defense, he presents a "leaky bucket" model: $BTC is lost to defunct keys, damaged devices, and poor inheritance planning, so a fixed emission could ultimately replace lost coins rather than infinitely increasing the spendable coin supply. Todd suggested a loss rate of about 0.1% per year. This is an input to the model, not an observed fact.
The problem is easy to spot. No one can verify future key loss, and the market has for years been reducing it through more secure storage, multisig setups, and inheritance tools. Tethering Bitcoin's monetary rule to an unknown failure rate is not a neutral engineering tweak. It's a bet that the "leak" will remain open.
Todd's fallback is demurrage: to charge a fee on coins when they are spent after a period of idleness, direct the proceeds to a fund, and allow miners to draw from it. This could be implemented as a soft fork—a backward-compatible rule change—whereas constant emission requires a hard fork. The accounting changes. The political bill—does not.
For holders, both versions draw from the same well. Tail issuance continuously dilutes balances. Demurrage includes a "toll" when coins finally move. One is a hidden tax via supply; the other is an explicit fee for saving. Neither resembles the fixed monetary policy people bought into.
"No, Peter Todd. Just no. 21 million is 21 million. That is Bitcoin's value proposition," replied one participant in the Bitcoin++ X thread.
Why the 21-Million Cap Holds Such Unusual Significance
Bitcoin's supply cap is the sharp edge separating it from central bank fiat money: no committees, no emergency meetings, and no new units when voters need funding. That's why the backlash is as cultural as it is technical. This limit is the social contract underlying the ticker.
Critics are not arguing that miners should work for free. They argue that a protocol built on absolute scarcity cannot easily turn scarcity into a variable when the subsidy schedule becomes inconvenient. Once a rule becomes negotiable, the market must price in the probability that the next exception will also come with a white paper.
When $BTC proponent Trey Sellers stated that "a fork aimed at changing Bitcoin's supply schedule will fail as hard as BIP-110, if not more," Blockstream founder and cryptographer Adam Back weighed in on the matter, focusing on the hardest part: how to "sell" a controversial Bitcoin fork to enough people to make it matter.
In his view, this requires wrapping a dangerous proposal in a simple story capable of rallying supporters, even if the underlying claims are false. "[The] trick is to find ways to engage and rally people to your dangerous and unwanted cause with simple, albeit false [narratives]. In BIP-110's case, the used: 1) JPEG spam and illegal [content] could be stopped, but developers are captured so they won't, 2) anti-Layer-2 activists, devs who want to 'etherify' bitcoin," wrote Back.
BIP-110 proponents were quick to seize on Todd's speech as a fresh argument for claims that Bitcoin's development is compromised. A much smaller and rarer set of Bitcoiners went further, openly supporting his "tail emissions" idea.
"$BTC can afford tail emissions. 0.21 $BTC/block = 0.05% annual inflation. That's peanuts compared to productivity growth in the economy. But the community will never unanimously support this. If it happens, it will only be via a hard fork," wrote X account user Noem.
A Debate With No Immediate Resolution
Todd acknowledged that a "tail emissions" hard fork is unlikely within the next five years, even if its supporters agree on a specific design. Changes to Bitcoin survive only when node operators, miners, developers, exchanges, wallet makers, and economic users decide to support them. This heated debate is a rough, but unambiguous, reflection of that hurdle.
This idea is not limited to Todd. Starkware CEO Eli Ben-Sasson has spoken in favor of limited perpetual issuance. "Limiting Bitcoin's supply to 21 million makes no sense. Because keys will be lost over time. In fact, as time tends to infinity, all keys will be lost," the Starkware head stated on X. Meanwhile, a Delving Bitcoin proposal floated in mid-2026 suggested paying 0.25 bitcoin per block starting around 2040 alongside fee burning. Each of these proposals hits the same wall: a security patch that alters the monetary base represents a security threat for coin owners.
The real test is not whether an elegant formula on paper can offset coin loss with issuance. It is whether fees will continue to pay for miners' work after subsequent halvings, whether hash power will concentrate further, and whether a robust solution can emerge without breaking one of the promises that made $BTC valuable. So far, the market's answer is real and ruthless: don't touch the limit.
The next halvings will show whether the fee market can reliably pay for hash power without turning Bitcoin into a perpetual subsidy machine. Until then, "tail emissions" remains a distant answer to that question, and any attempt to present them as innocuous will meet resistance from those who see 21 million as the one rule no developer has a right to revisit.
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