The dogma of the absolute 21 million unit cap, a central pillar of Bitcoin's monetary policy, is currently the subject of an unusual debate following recent statements by Ellie Ben Sasson. The co-founder of StarkWare and an iconic figure in cryptography has publicly questioned the relevance of this fixed limit. He suggests abandoning this rigid lock in favor of a "tail emission" mechanism—a continuous monetary issuance capped at an annual rate of approximately 4%. This proposal is part of a broader discourse, sometimes echoed by experts like Peter Todd, aimed at anticipating the end of block subsidies and compensating for the permanent loss of tokens over time.
The main argument in favor of such a reform rests on the economic sustainability of the network. As rewards granted to miners diminish toward zero, the security of the protocol will have to rely exclusively on transaction fees. By introducing controlled inflation, proponents of this flexibility hope to guarantee consistent miner compensation, thereby ensuring the network's robustness over the very long term. This approach, while economically rational within a traditional financial framework, clashes head-on with the original vision of Satoshi Nakamoto, who designed Bitcoin as an asset with a completely inelastic supply.
The Bitcoin community, through the voice of analysts like Richard Détente, firmly rejects this vision. Far from being a mere adjustable technical variable, the 21 million limit is perceived as an immutable social contract. Modifying this parameter would undermine the consensus of trust that drives the asset's value. For its defenders, tampering with this rule would be like opening Pandora's box, transforming an algorithmic and predictable monetary policy into a discretionary system subject to the vagaries of human decision-making and the influence of lobby groups.
Beyond the technical aspects, the major issue lies in preserving the sovereignty of the network. The success and resilience of Bitcoin do not stem from its ability to adapt to momentary needs, but precisely from its resistance to arbitrary change. By enshrining immutability as a cardinal virtue, the protocol protects itself against any centralized intervention. The idea that an entity or a consensus could adjust the money supply at will would weaken Bitcoin's credibility as digital gold, whose absolute scarcity constitutes its fundamental attribute in the eyes of investors and users alike.