Debates over Bitcoin’s fixed supply cap have flared up once again in the crypto community. StarkWare CEO Eli Ben Sasson has argued that Bitcoin’s historical 21 million token ceiling may not be sustainable in the long run. Instead, Ben Sasson has proposed a permanent 4% annual issuance rate, a suggestion that has revived longstanding divisions over Bitcoin’s monetary policy.
Ben Sasson points out that, over time, the number of Bitcoins actually accessible in circulation is consistently falling due to the permanent loss of private keys. He argues that spread across decades, this process results in an ever-growing share of coins becoming permanently inaccessible, pushing available supply closer to zero over time.
Hardware wallet manufacturer Ledger previously estimated that nearly 4 million Bitcoins might be lost forever. Ben Sasson highlights such data in support of his view that the current model may not generate enough liquidity in the future.
Importantly, Ben Sasson is not proposing an unlimited supply model that would eliminate scarcity altogether. Instead, he believes a predictable and enduring 4% annual issuance rate could provide a solid framework, creating a supply model more aligned with long-term global population growth and ensuring that enough Bitcoin remains accessible for future users.
Mini glossary: A satoshi is the smallest unit of Bitcoin. One Bitcoin is divisible into 100 million satoshis, enabling the network to technically facilitate extremely small transactions.
Some critics counter Ben Sasson’s argument by emphasizing Bitcoin’s extreme divisibility: the total supply can be split into 2.1 quadrillion satoshis, so there’s no practical shortage of units for transactions. Ben Sasson responds that satoshis controlled by lost private keys are just as inaccessible, so practical divisibility does not resolve the underlying issue.
A substantial segment of Bitcoin supporters insists that the 21 million supply cap is central to the network’s identity. For these advocates, the fixed cap guards against inflation and currency debasement. They warn that any alteration could undermine Bitcoin’s narrative as “digital gold”.
Dissent is also aimed at the premise that lost Bitcoin constitutes a fundamental problem. Opponents argue that permanently inaccessible coins simply make the remaining supply scarcer, which is viewed as a value-supportive feature for current holders.
Michael Saylor, chairman of Strategy (formerly MicroStrategy), previously echoed a similar scarcity perspective. Saylor announced plans to ensure his Bitcoins are permanently inaccessible after his death, arguing this will further boost remaining scarcity. Strategy is a US-based software and treasury management company recognized for its large Bitcoin holdings.
At this stage of the debate, Ben Sasson maintains that a predictable inflation rate could support long-term Bitcoin usage. However, the majority of the community continues to defend the untouched 21 million cap as the foundation of the system.
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