A proposal known as “The Cat” is igniting a major debate within the Bitcoin community—not only because of its potential impact on Ordinals and NFTs, but because it directly touches on the principle of asset immutability on Bitcoin, one of the core values underpinning trust in the network.
Unlike many past controversies driven by economic or market considerations, “The Cat” represents a purely consensus- and design-philosophy–level debate. It is a space where there are no easy solutions, and every possible choice comes with profound trade-offs.
1. What Is “The Cat,” Really?
From a technical standpoint, “The Cat” is a proposal aimed at addressing the problem of UTXO bloat—a situation in which Bitcoin’s UTXO set (Unspent Transaction Outputs) continues to grow and becomes an increasing operational burden for nodes over the long term.
In Bitcoin’s model, each UTXO represents an unspent transaction output. Every full node must:
- store the entire current UTXO set
- continuously verify and update this set as new transactions occur
- ensure that every UTXO is valid and spendable under the consensus rules
As a result, the size of the UTXO set directly affects the cost of running a node, the degree of decentralization, and Bitcoin’s ability to remain sustainable over decades.
The Origins of the UTXO Bloat Problem
According to the argument behind “The Cat,” the recent expansion of the UTXO set is driven primarily by:
- the rapid growth of Ordinals and NFTs on Bitcoin
- millions of extremely small (dust-level) UTXOs that nevertheless contain data
- UTXOs created mainly to store or “mark” data rather than serve a traditional monetary purpose
Unlike typical UTXOs—which are eventually spent, consolidated, or disappear over time—many UTXOs associated with Ordinals are almost never reused. As a result, they:
- remain permanently in the UTXO set
- force every new node to download and store them
- increase hardware requirements and synchronization costs
From a purely technical perspective, this is a real problem—and one that tends to worsen over time.
How Does “The Cat” Propose to Solve It?
“The Cat” takes a highly interventionist approach. Instead of relying on incentives for users to clean up UTXOs themselves, it seeks to address the issue directly at the consensus level.
Specifically, the proposal suggests:
- identifying certain categories of UTXOs (typically very small ones with no clear monetary purpose)
- rendering these UTXOs unspendable through a change in consensus rules
- then removing them from the UTXO set that nodes must maintain, since they can no longer affect the network state
The ultimate goals are to:
- reduce the size of the UTXO set
- lower storage and processing requirements for nodes
- make Bitcoin easier to sustain over the long term, especially at global scale
At an abstract level, this resembles a kind of “freeze-and-garbage-collection” mechanism in an operating system.
Where Does the Problem Lie?
In theory, this approach may appear reasonable. In the context of Bitcoin, however, it touches on some of the network’s most sensitive principles.
First, UTXOs are assets. Once a UTXO is created validly, Bitcoin has historically assumed that:
- it can be spent at any point in the future
- no entity has the authority to invalidate it
“The Cat” introduces, for the first time, the idea that:
- a valid UTXO could be proactively invalidated by the network for “system-level” reasons.
Second, consensus-level changes are irreversible. If:
- UTXOs are misclassified
- the logic is abused
- or the criteria expand over time
the consequences would directly undermine trust in property rights on Bitcoin—and would be nearly impossible to fix through ordinary updates.
More Than a Technical Issue
For these reasons, “The Cat” is no longer just a system-optimization proposal. It becomes a foundational question:
- Should Bitcoin prioritize long-term operational sustainability, even if it means sacrificing absolute immutability?
Or:
- Should Bitcoin accept rising technical costs in order to preserve the principle that every valid asset can never be confiscated or invalidated?
At this point, “The Cat” touches the very core identity of Bitcoin—not merely Ordinals or NFTs.
2. Why Are Many Bitcoin Core Developers Strongly Opposed?
The strongest backlash against “The Cat” did not initially come from the Ordinals or NFT communities, but from Bitcoin’s core developers—especially long-time contributors to Bitcoin Core. This signals that the issue is not about personal preferences or “hatred of NFTs,” but about the risk of undermining Bitcoin’s most fundamental principles.
“Asset Confiscation” at the Consensus Level
The central argument of the opposing camp is that “The Cat” effectively introduces a mechanism for asset confiscation at the consensus level.
In Bitcoin’s original design, a valid UTXO has the following properties:
- it is created according to consensus rules
- it is controlled by the corresponding private key
- it cannot be invalidated by any third party, including a majority of nodes
“The Cat” challenges this premise by proposing that:
- certain UTXOs could be declared “no longer spendable” by the network
- not because they violate any rules, but because they are deemed a system burden
For many Bitcoin Core developers, this is a red line. If Bitcoin allows UTXOs to be invalidated for the sake of “system optimization,” then in principle:
- there is nothing to guarantee that such criteria will not be expanded in the future.
A Dangerous Precedent, Not Just an Immediate Impact
A key point in the opposition’s reasoning is that the real concern is not how many UTXOs are affected today, but the precedent set for tomorrow.
Even if “The Cat” is carefully designed to target only:
- extremely small UTXOs
- UTXOs containing Ordinals data
the underlying mechanism still implies that:
- consensus can decide which assets “deserve to exist” and which do not
Many developers warn that:
- today it’s NFTs
- tomorrow it could be coins deemed “inactive”
- further down the line, it could be coins linked to some policy decision or social controversy
Bitcoin has historically avoided this kind of judgment precisely to prevent drifting toward financial systems where assets can be controlled or seized.
“Bitcoin Cannot Be Confiscated” Is a Belief, Not a Slogan
One of the core values that makes Bitcoin trustworthy is simple:
If you control the private key, no one can take your coins.
This belief is not merely technical—it is economic and social. It is why:
- Bitcoin is seen as censorship-resistant money
- it is used in places where traditional financial systems are unreliable
- it is regarded as a “last-resort asset” independent of people or institutions
“The Cat,” even with technical motivations, shakes this belief. For many Bitcoin Core developers, no technical improvement is worth trading away this foundation of trust.
It Doesn’t Address the Root of the Problem
Beyond philosophical concerns, critics also argue that “The Cat” does not truly address the root cause of Ordinals/NFTs:
- the data still exists permanently in blocks
- users can still create new data structures
- only the current form of expression is disabled
This makes the proposal:
- high-risk
- of uncertain technical benefit
- but clearly costly in terms of principles
Consensus Changes Must Be Extremely Conservative
Finally, many Bitcoin Core developers emphasize that:
- consensus-level changes are nearly irreversible
- they should only be made when the benefits are overwhelming and no alternatives exist
In the case of “The Cat,” they argue that:
- the risks are clear
- the benefits are debatable
- and less invasive solutions may exist
For this reason, opposing “The Cat” is not blind conservatism, but deliberate conservatism—aimed at protecting the principles that have allowed Bitcoin to survive and earn trust for more than a decade.
3. The Supporters’ Argument: A Long-Term Operational Survival Problem
Despite facing strong opposition from many Bitcoin Core developers, “The Cat” is not an idea that supporters take lightly. Those in favor argue that the debate has been overly focused on philosophical concerns, while the technical challenges Bitcoin faces are real and long-term in nature.
UTXO Bloat Is Not a Hypothetical Concern
From a technical perspective, supporters emphasize that UTXO bloat is a structural issue, not a temporary phenomenon. Every UTXO that exists:
- increases the size of the state set that every full node must maintain
- raises synchronization costs for new nodes
- lengthens transaction verification times
If the trend of creating millions of small UTXOs that are rarely, if ever, spent continues, then over the long run:
- the cost of running a full node will rise
- fewer individuals will be able to operate their own nodes
- the network risks centralization at the infrastructure level, even if consensus rules remain decentralized
From this viewpoint, preserving the ability to run nodes cheaply and easily is the true way to protect Bitcoin’s decentralization in practice.
Ordinals and NFTs Are Seen as “Non-Monetary” Use Cases
A key argument from supporters is that not all UTXOs serve the same purpose.
In their view:
- Bitcoin was designed as a decentralized monetary system, not a data-storage platform
- Ordinals and NFTs exploit valid protocol rules, but run counter to the original design intent
- creating extremely small UTXOs purely to “anchor data” consumes shared network resources
From this standpoint, “The Cat” is not asset confiscation, but rather:
- a redefinition of what purposes the network’s shared resources should be used for.
This is a resource-governance perspective, rather than one that treats every UTXO as a purely financial asset.
A Trade-Off Between Two Types of Risk
Supporters acknowledge that “The Cat” is an extremely sensitive proposal, but they argue that:
- inaction itself is also a risky choice.
Specifically:
- if UTXO bloat is left unaddressed, Bitcoin could become increasingly difficult to operate over the next 10–20 years
- this could undermine the very decentralization Bitcoin seeks to preserve
Thus, the debate is not about:
- whether there is risk or not,
but rather:
- which risk to accept:
- the risk to the principle of absolute non-confiscation, or
- the risk to long-term operability and scalability.
From the supporters’ perspective, “The Cat” is an attempt—albeit an imperfect one—to confront this dilemma directly.
Even Supporters Acknowledge Red Lines
An important point often overlooked is that even proponents of “The Cat” do not see it as an easy or unquestionably safe solution.
Many supportive views are conditional:
- the criteria for identifying UTXOs must be extremely strict
- monetary coins must not be affected
- any consensus-level change must be scrutinized intensely, since its consequences are nearly impossible to reverse
This shows that:
- the debate is not a battle of good versus evil
- but a conflict between two reasonable priorities that are difficult to reconcile.
“The Cat” as a Warning Signal Rather Than a Final Solution
From a broader perspective, many supporters see “The Cat” less as a proposal that must be implemented, and more as:
- a way to force the Bitcoin community to seriously confront the UTXO bloat problem
- a signal that existing mechanisms may be insufficient for Bitcoin’s next era
Even if “The Cat” is never adopted, the debate surrounding it remains valuable, because it:
- exposes Bitcoin’s current limitations
- forces the community to weigh the preservation of principles against the need for evolution
4. Long-Term Consequences If “The Cat” Is Adopted: Risks That Outweigh Short-Term Gains
If “The Cat” were to move beyond discussion and actually be accepted and implemented at Bitcoin’s consensus level, its consequences would extend far beyond Ordinals or NFTs. It would fundamentally reshape how the community understands ownership and trust on Bitcoin.
4.1. A Precedent for Intervening in Valid Assets
The most serious consequence is the precedent it would set. For the first time in Bitcoin’s history, the network would acknowledge that:
- a UTXO created validly
- that did not violate any rules at the time of creation
- could still be invalidated later for “system-level benefits”
Even if the initial scope were very narrow, this precedent breaks a foundational assumption:
“Valid today means valid forever.”
Once that assumption is broken, subsequent boundaries become blurred:
- UTXOs deemed “non-monetary”
- UTXOs considered “inactive for too long”
- UTXOs labeled as “a burden on the network”
The issue is not whether these cases will occur, but that they become possible in principle.
4.2. Impact on Economic Trust, Not Just Technical Design
Bitcoin is not just software; it is a system of economic trust. Much of Bitcoin’s value derives from the belief that:
- ownership is absolute
- there is no confiscation mechanism
- there are no “reasonable exceptions”
If “The Cat” were adopted—even for technical reasons—it would:
- force users to question the long-term certainty of ownership rights
- weaken Bitcoin’s appeal as a censorship-resistant asset
- introduce uncertainty for institutions, funds, and long-term holders
In finance, uncertainty about the rules of the game can be just as dangerous as high costs or slow performance.
4.3. Risk of Community and Software Fragmentation
A highly controversial consensus change like “The Cat” could easily lead to:
- divisions among developers
- disagreements between nodes, miners, and users
- even the possibility of a fork, however undesirable
Bitcoin’s history shows that:
- disputes over core principles (such as the block size wars)
- leave lasting consequences, even when no fork occurs
“The Cat” touches an even more sensitive issue: property rights.
4.4. Technical Benefits May Be Overstated
A common counterargument is that the technical benefits of “The Cat” may not justify the risks.
Even if some UTXOs are removed:
- the data still exists permanently on the blockchain
- new forms of data usage can still emerge
- storage pressure may return in other ways
This leads many to argue that:
- “The Cat” treats the symptoms, not the root cause
- while exacting a high price in foundational principles
4.5. Why Many Believe “The Cat” Is Unlikely to Be Accepted
Because of these potential consequences, most cautious observers believe that:
- the likelihood of “The Cat” being adopted is very low
- Bitcoin is extremely conservative about any changes that affect ownership rights
Historically, Bitcoin has been willing to be:
- slower
- more expensive
- less flexible
as long as it preserves the principle:
“If you control the private key, the coins are yours—forever.”
5. “The Cat” as a Stress Test for Bitcoin’s Identity and Limits
The controversy surrounding “The Cat” shows that Bitcoin is confronting its natural limits as it enters a more mature phase. When the network was small, many issues could be ignored or resolved through social compromise. But as Bitcoin becomes global value-storage infrastructure, every consensus-level decision carries implications far beyond technical design.
No Longer Just About Ordinals or NFTs
Although Ordinals and NFTs were the immediate catalyst for “The Cat,” the essence of the debate is not about whether Bitcoin should host NFTs. The deeper question is:
- Is Bitcoin willing to trade off absolute non-confiscation in order to optimize long-term operability?
Or:
- Is Bitcoin willing to accept rising technical costs to preserve absolute trust in property rights?
This question has no simple “right or wrong” answer—it is fundamentally a philosophical choice.
Conservatism Is Not Stagnation
A common misunderstanding is that opposing “The Cat” means rejecting Bitcoin’s evolution. In reality, Bitcoin’s conservatism is intentional. It reflects the belief that:
- foundational principles matter more than short-term optimization
- consensus changes should only occur when no alternatives remain
- once trust is lost, it is extremely difficult to restore
Throughout Bitcoin’s history, many proposed improvements have been delayed or rejected not because they were “bad,” but because the risk of undermining trust outweighed the benefits.
“The Cat” as a Warning Signal
From a broader perspective, “The Cat” may never be implemented, but it serves as:
- a warning signal about long-term UTXO bloat
- a reminder that Bitcoin is not immune to scaling pressures
- a test of what the community prioritizes when core values collide
Even if the proposal is ultimately rejected, the debate itself is valuable, because it forces the community to clearly define the boundaries Bitcoin must not cross.
Bitcoin’s Core Identity Reaffirmed
Judging by the strong reactions from many developers and users, one conclusion stands out clearly: Bitcoin is willing to tolerate technical inefficiency as long as it preserves the principle of inviolable ownership.
In a blockchain world where many networks are willing to change the rules to optimize performance, Bitcoin continues to choose the harder path:
slow, conservative, but trustworthy.
And it is precisely through controversies like “The Cat” that this identity is most clearly revealed.
Conclusion
“The Cat” is not merely a proposal about Ordinals, NFTs, or UTXO management. It is a stress test for Bitcoin’s core philosophy at a time when the network is confronting the practical limits of long-term scalability. The debate it has sparked reveals a fundamental tension between two legitimate priorities: maintaining Bitcoin’s operability over decades and preserving the absolute immutability of property rights.
While the technical concerns behind “The Cat” are real, its proposed solution introduces risks that reach far beyond efficiency gains. By allowing valid UTXOs to be invalidated retroactively for system-level reasons, it would establish a precedent that challenges one of Bitcoin’s most critical assurances—that ownership, once established, cannot be revoked. In a system whose value is deeply rooted in trust, even narrowly scoped exceptions can have disproportionate consequences.
The strong resistance from many core developers underscores an important reality: Bitcoin’s conservatism is not accidental, nor is it a failure to innovate. It is a deliberate design choice shaped by the understanding that trust, once eroded, is extraordinarily difficult to restore. Bitcoin has historically chosen to tolerate higher costs, slower performance, and operational inefficiencies rather than compromise on principles that define its role as a censorship-resistant monetary system.
Ultimately, whether “The Cat” is adopted is almost secondary to what the debate itself reveals. It highlights where Bitcoin’s red lines lie and reaffirms that changes touching ownership and consensus will be judged not by short-term optimization, but by their impact on long-term credibility. In that sense, “The Cat” serves less as a roadmap for change and more as a reminder of why Bitcoin evolves cautiously—and why, for many, that caution remains its greatest strength.
Disclaimer: The information provided here is for informational purposes only and should not be considered financial, investment, legal, or professional advice. Always conduct your own research, consider your financial situation, and, if necessary, consult with a licensed professional before making any decisions.