Eli Ben-Sasson, co-founder of Starknet, posted on X to challenge the rationality of Bitcoin’s 21 million coin supply cap mechanism. He argued that private keys will keep being lost over time, and in the ultra-long run, all private keys will eventually become inaccessible. Ben-Sasson stated he fully supports monetary policies with an 'absolute upper bound', yet suggested a revised framework: setting a fixed maximum annual issuance rate (e.g., 4% per year) to align circulating supply with human population growth and guarantee sufficient market liquidity.