Bitcoin’s security model is currently underpinned primarily by the block subsidy, which incentivizes miners to contribute hashpower and secure the network. However, the block subsidy halves approximately every four years, and over time, it will asymptotically approach zero.
This raises the concern that in the long run, transaction fees alone may not be sufficient to provide the same level of security, potentially leading to a lower hash rate and increased vulnerability to attacks like deep reorgs or 51% attacks.
I’m curious about both the theoretical and practical implications of this transition. Specifically:
What are the expected consequences of the diminishing block subsidy on miner behavior and overall network security?
Are there historical fee market trends that suggest whether fee-based security is viable?
What mitigation strategies (if any) have been proposed or discussed, such as tail emissions, protocol changes, or Layer 2 mechanisms that could support L1 security?
I’m asking from both an engineering and economic perspective, and I’d appreciate references to existing research, proposals, or data-driven analysis if possible.
