StarkWare CEO Sparks Debate With Proposal To Replace Bitcoin’s 21 Million Cap

StarkWare CEO Eli Ben Sasson reignited a long running debate over Bitcoin’s fixed supply on Tuesday, suggesting the 21 million coin cap should be replaced with a steady 4% annual issuance rate instead.

Argument Centers On Lost Keys

Ben Sasson argued the current cap doesn’t hold up over time since private keys are inevitably lost, meaning usable Bitcoin will keep shrinking toward zero. Ledger estimated in November that as many as 4 million Bitcoin have already been lost or destroyed. Ben-Sasson said he still favors a hard upper limit overall, but believes a 4% annual inflation rate would roughly match global population growth.

Community Pushes Back Hard

Critics quickly challenged the idea, with one user pointing out that Bitcoin can be divided into 2.1 quadrillion satoshis, arguing there’s plenty of supply to go around. Ben-Sasson countered that those smaller units would face the same long-term loss problem. Others argued that removing the fixed cap would strip Bitcoin of what makes it different from other cryptocurrencies, though Ben-Sasson maintained that scarcity could still hold as long as the inflation rate stayed fixed.

Zcash Model Offered As Alternative

Zcash founder Zooko Wilcox suggested Bitcoin could instead look at a proposal being explored in the Zcash network, known as the Network Sustainability Mechanism.

The idea would keep Zcash’s own 21 million cap intact while allowing burned tokens to be gradually reissued as block rewards over four years, easing pressure on miner incentives without altering the hard limit. Any similar change to Bitcoin would require broad consensus among developers, miners and node operators.