Blockchain as a Dead-End Branch of Development
Miloslav Grundmann5 min read·Just now--
Why absolute transparency undermines the very nature of money
In public debate, blockchain technology is often presented as a breakthrough solution for trustworthy value transfer without the need for a central authority. This view has a clear internal logic: a transparent and immutable record of transactions is expected to reduce fraud and increase trust in the system. However, this assumption is only partial. Absolute transparency does not lead only to trust — it also leads to the irreversible accumulation of information that can be reinterpreted in the future and used to impose claims or restrictions.
This article is based on the original Czech version available here:
https://miloslavgrundmann.substack.com/p/ekonomika-blockchain-jako-slepa-vetev
A fundamental property of a functional medium of exchange is fungibility. This does not mean absolute identity of all units, but rather practical indistinguishability: individual units must be accepted in everyday use without the need to examine their history. This property is not a technical detail, but a structural prerequisite for liquidity. If each unit had to be individually assessed, transaction costs would quickly exceed a tolerable threshold, and the system would cease to function as a general means of payment. In other words, fungibility has a threshold character: its disruption is initially tolerable, but beyond a certain point it leads to the breakdown of a unified market.
Blockchain disrupts this principle at its core. Each unit carries a fully traceable and permanent history. This creates a mechanism that can be described directly: transparency leads to the preservation of history, preserved history enables future reinterpretation, reinterpretation creates the possibility of claims, and these claims can lead to the differentiation of individual units. This mechanism is already observable in practice. In institutional settings, the existence of such data typically creates structural pressure to make use of them, because ignoring available risk-relevant information becomes increasingly difficult to justify in terms of risk management and institutional responsibility. The moment units begin to differ based on their past, the system ceases to be effectively fungible.
This process is not a one-time event, but cumulative and open-ended. Information stored on a blockchain is permanent, while norms, rules, and political contexts evolve. A transaction considered legitimate today may be judged problematic in the future. Blockchain thus creates not only transparency, but also a structural retroactive space for evaluating the past. Each unit therefore carries not only its history, but also an indeterminate future risk associated with its possible reinterpretation.
The result is a gradual loss of fungibility. Units begin to differ according to their perceived “clean” or “tainted” status, leading to an implicit hierarchy of assets. This phenomenon is no longer purely theoretical: in practice, there are already cases of outputs being labeled as problematic (“tainted”), including their blocking on exchanges or rejection by regulated institutions. Formally identical units thus acquire different economic values. Once this process crosses a certain threshold, the unified, fungible market fragments into multiple layers with differing levels of acceptability.
This development has a fundamental consequence: it undermines the possibility of truly final settlement. If history can always be reinterpreted, one cannot be certain that a transaction is definitively closed. This contradicts one of the core functions of money — the ability to extinguish an obligation without residual future risk.
A specific attempt to address this problem involves anonymization techniques such as transaction mixing or the use of privacy layers. These, however, introduce another type of information: the very attempt at anonymization becomes a distinguishing feature. Units that have passed through anonymization mechanisms are no longer neutral; they carry information that their history has been deliberately obscured. In an environment where units are already being differentiated based on history, anonymization becomes not a solution, but another source of “contamination.”
The problem is deeper. If the entire system is public and all transactions are permanently available, no method of hiding transaction history constitutes true anonymization. Any such concealment creates a new data structure that may be analyzed in the future using methods not yet available today. In other words, anonymization is not a stable property, but a temporary state relative to current analytical capabilities. As these capabilities evolve, previously hidden information may be reconstructed or at least partially revealed.
This conclusion does not apply only to partially anonymous systems. Even systems designed to be fully anonymous face a gradual erosion of anonymity. The reason is not necessarily a failure of cryptography, but the accumulation of side information generated through usage. In this sense, the development of Bitcoin is instructive: it was originally perceived as anonymous or practically untraceable, but as data volume increased, analytical tools improved, and connections to the real economy expanded, its effective anonymity gradually weakened. This suggests that even strong anonymization properties may erode over time simply through the system’s use.
In other words, once a system has lost effective fungibility, it cannot be restored through local interventions. A part of the blockchain that has undergone anonymization becomes itself suspicious or problematic, because it deviates from the transparent standard. This leads to a paradox: the more a unit attempts to shed its history, the more it generates new, negatively interpretable information about itself. Anonymization does not eliminate the problem of information accumulation; it merely shifts it to a higher level, where it becomes even harder to control.
One might argue that the problem could be solved by implementing full anonymity across the entire system. This would indeed restore fungibility. However, such a system would simultaneously abandon transparency, which is the main argument for blockchain. Moreover, fully anonymous systems are likely to face strong and persistent regulatory resistance precisely because they prevent retrospective control. In practice, this leads to a closed alternative: either transparency with erosion of fungibility, or anonymity with limited acceptance.
From this perspective, the problem of blockchain is not a technical flaw, but a consequence of its fundamental architecture. A technology that assigns an indelible history to each unit creates the conditions for its future contestation. Once this possibility begins to be systematically exploited, fungibility erodes, and transaction uncertainty increases.
Blockchain is therefore not a dead-end in general, but it is a dead-end as a universal, fungible monetary infrastructure. In areas where auditability and permanent records are desirable, it can be useful. As a foundation for a generally accepted, liquid, and final medium of exchange, however, it is in structural conflict with the basic conditions required for money to function.
