Emin Gün Sirer, founder of Avalanche, has flagged a structural threat to Bitcoin’s long-term security model: declining miner incentives from the network’s halving cycle. On May 10, 2026, Sirer warned that Bitcoin’s design—which cuts mining rewards by 50% every four years—creates compounding pressure on network participants. He proposed leveraging Avalanche technology to build a layer-2 solution that could stabilize mining economics without requiring changes to Bitcoin’s base layer consensus rules.
The Halving Dilemma: Shrinking Rewards, Rising Risk
Bitcoin’s security depends on miners dedicating computational power to validate transactions and secure the network. The protocol cuts block rewards in half every 4 years to control supply inflation and maintain scarcity. Currently, Bitcoin trades near $82,000, yet the structural math is unforgiving: as block rewards shrink toward zero, miners increasingly depend on transaction fees for income. Smaller mining operations face margin compression and potential exit from the network. This consolidation risk raises a critical question: can transaction fees alone sustain sufficient hashrate to prevent 51% attacks or network takeover by a handful of well-capitalized mining pools?
Layer-2 as a Mining Incentive Mechanism
Sirer’s proposed solution uses Avalanche to create a secondary settlement layer that could generate new revenue streams for miners without altering Bitcoin’s core protocol. Layer-2 systems process transactions off-chain and periodically anchor security proofs to the base layer, reducing settlement costs while maintaining Bitcoin’s security guarantees. The mechanics remain technically unspecified in public statements, but the principle is direct: if a layer-2 network built on Avalanche technology routes significant transaction volume through Bitcoin, it could increase fee pressure on the base layer and improve miner economics. Ethereum’s layer-2 ecosystem has demonstrated this model’s viability, with protocols like Arbitrum and Optimism generating billions in locked value.
Bitcoin Community Skepticism and Centralization Trade-offs
The Bitcoin community has historically resisted external dependencies and major protocol modifications. Introducing Avalanche—a proof-of-stake consensus system fundamentally different from Bitcoin’s proof-of-work—as a layer-2 backbone may face resistance from purists concerned about security assumptions and cross-chain trust models. Conversely, some analysts argue that rising Bitcoin price and organic transaction growth will naturally increase fee revenue, eliminating the need for novel infrastructure. The tension reflects a deeper disagreement: whether Bitcoin’s halving schedule is a feature (ensuring scarcity and long-term decentralization) or a bug (creating predictable security degradation).
What Happens When Block Rewards Approach Zero
No consensus exists on when declining rewards become critical. Bitcoin’s final halving occurs around 2140, but economic pressure intensifies decades before that point. If transaction fees fail to compensate miners adequately, network hashrate could drop sharply, reducing security margins and increasing attack costs for adversaries. Sirer’s warning reflects a real engineering challenge: designing sustainable incentive structures for networks operating under hard supply caps. Whether Avalanche layer-2 adoption becomes reality depends on Bitcoin developer consensus, which remains uncertain.
