Back and Todd Clash Over Bitcoin Supply Cap Controversy

A debate has erupted among Bitcoin pioneers Adam Back and Peter Todd over the cryptocurrency's fixed 21 million supply. The issue revolves around what will happen when Bitcoin's block subsidy eventually reaches zero in approximately 2140.

Currently, miners earn BTC through newly issued coins and transaction fees. The reward is 3.125 BTC per block, which is cut in half roughly every four years. Eventually, miners will rely entirely on transaction fees to secure the network.

Peter Todd argues that this could create a problem because transaction fees can fluctuate significantly. He believes that miners may have incentives to reorganize the blockchain or re-mine blocks containing unusually large fees.

Todd proposes a small, permanent Bitcoin block reward, often called a 'tail emission,' to continue indefinitely. He also suggests that lost BTC could offset additional issuance due to permanently lost coins through inaccessible wallets and forgotten keys.