[BIP Proposal] Strict circular economy within the Bitcoin network

This proposal introduces a significant consensus rule change aimed at establishing a perpetual block subsidy within the Bitcoin network while adhering to the 21 million coin supply cap. The plan involves setting an expiration limit on Unspent Transaction Outputs (UTXOs), where UTXOs that exceed a predefined age threshold, denoted as MAX_UTXO_AGE, will no longer be valid for transactions and will be removed from the nodes' active Chainstate database. Specifically, this threshold could be set at 1,048,576 blocks.

The core idea behind pruning aged UTXOs is not to recycle these satoshis directly into immediate block rewards. Instead, the nominal value of expired satoshis would be transferred to a pending emission reserve. This mechanism aims to extend the duration of halving epochs dynamically, ensuring that miners can continue receiving block subsidies indefinitely without introducing any new coins beyond the fixed supply limit.

For further details on the mechanics and implications of this proposal, one can refer to the documentation available on GitHub at this link. The proposal is currently open for discussion, seeking input from the broader Bitcoin development community to refine and potentially adopt this innovative approach to maintaining Bitcoin's economic policies.