<ul data-eligibleForWebStory="true">Bitcoin miner fees have hit a 13-year low in BTC terms.The decline is attributed to low on-chain activity and increased empty block production.Concerns have been raised about the long-term sustainability of the network's incentive model.BTC-denominated fee income has sharply dropped despite the asset's high USD price.Fewer transactions competing for block space has led to lower fees.Miners are relying more on block subsidies as users pay fewer premiums for block inclusion.Future halvings will further reduce the BTC block reward, adding to miner revenue concerns.There are questions about whether upgrades or Layer 2 solutions can boost fee markets.Worries exist about miner centralization and decreased infrastructure investment amid low revenue periods.The industry awaits potential catalysts like ETF inflows and institutional adoption to improve miner fee earnings.The network is currently experiencing the lowest miner fee earnings in over 10 years.