บทเรียนที่ 4

Yield Opportunities on Bitcoin L2s

Until recently, Bitcoin has lacked the infrastructure needed for generating on-chain yield in a trust-minimized way. Yield-bearing strategies in the Bitcoin ecosystem were either custodial, involving centralized services like BlockFi and Nexo, or indirect, requiring users to wrap their BTC and deploy it on Ethereum-based platforms. Both approaches compromised either custody or decentralization. The emergence of BitVMX-powered Layer-2 solutions has changed this paradigm by introducing native mechanisms for earning yield on Bitcoin without relying on wrapped tokens or external consensus layers. This module explores the types of yield opportunities now available on Bitcoin-native Layer-2s, how they compare to Ethereum-based DeFi, and what risks must be considered.

On-Chain Lending and Borrowing with Native BTC

One of the most fundamental components of decentralized finance is the ability to lend and borrow assets. Ethereum achieved this early on through platforms like Compound and Aave, which rely on smart contracts to pool funds, issue overcollateralized loans, and manage interest rates algorithmically. These systems have traditionally been out of reach for Bitcoin users unless they tokenized their BTC and bridged it into Ethereum.

BitVMX-enabled Layer-2s make it possible to replicate this lending model using native BTC. In this setup, users can deposit real BTC into a vault contract on the base layer. The vault is controlled by a BitVMX-based dispute-resolved system that governs how the funds are managed on Layer-2. Loans are issued using off-chain logic, interest accrues according to predefined schedules, and all activity is monitored and verified through fraud proofs.

Because the underlying BTC remains on-chain and under programmable control, borrowers and lenders can interact without intermediaries. Interest rates are set algorithmically or through governance mechanisms, and repayments are enforced using smart contract logic. This preserves self-custody, eliminates the need for trust in custodians, and enables real yield on Bitcoin holdings.

Liquidity Pools and Automated Market Making

Automated market makers (AMMs) represent another cornerstone of DeFi. These systems allow users to trade assets and provide liquidity without relying on centralized exchanges. In Ethereum, protocols like Uniswap and Curve dominate this space, offering yield to liquidity providers in the form of swap fees and governance token incentives.

On Bitcoin Layer-2s, BitVMX allows for similar AMM implementations using virtual machine logic and on-chain commitments. For example, a user may deposit BTC and a stablecoin like USDT into a liquidity pool governed by a BitVMX-enabled program. Trades are executed off-chain, but balances and fee distributions are verified through periodic commitments and dispute windows.

Because all transactions can be challenged and settled back to the Bitcoin main chain, these AMMs maintain a level of finality and trust comparable to Ethereum-based platforms. Moreover, users no longer need to wrap their BTC or expose themselves to Ethereum gas costs and bridge risk. Yield is generated from swap fees and may also include incentive structures such as staking or farming rewards, distributed directly on the Layer-2 network.

Tokenized Real-World Assets with Bitcoin Settlement

Real-world asset (RWA) tokenization is a fast-growing sector within crypto. It involves representing off-chain assets, such as treasury bills, bonds, or real estate, as tokens that can be traded, staked, or used as collateral on-chain. While Ethereum has led the way in RWA development, Bitcoin Layer-2s are beginning to offer similar capabilities using native BTC as collateral and settlement currency.

Projects like Citrea are integrating RWA issuers into their Layer-2 platforms, allowing users to purchase yield-generating tokens (e.g., tokenized U.S. treasuries) directly using BTC. These tokens may be issued by regulated entities and represented on-chain as digital certificates. The entire process, from purchase to yield distribution, is managed through BitVMX-based smart contracts and verifiable off-chain logic.

What sets Bitcoin-native RWA protocols apart is their ability to denominate returns in BTC rather than stablecoins or fiat. This model is particularly attractive to long-term holders and institutional treasuries that want to maintain Bitcoin exposure while earning yield on idle assets. Settlement occurs through Bitcoin-native bridges, ensuring compliance and minimizing custodial risk.

Validator Rewards and Network Incentives

Yield on Bitcoin Layer-2s is not limited to financial applications. Some Layer-2 networks, particularly those using BitVMX to secure rollups or bridges, offer validator incentives and staking-style rewards. In these systems, validators monitor transaction execution, participate in fraud-proof games, and serve as dispute resolution agents. In return, they receive fees from Layer-2 users or block reward-like emissions from the protocol itself.

These incentives function similarly to Ethereum’s proof-of-stake system, although they do not require consensus changes on Bitcoin. Instead, validators stake BTC or other tokens as collateral and are subject to slashing if they behave dishonestly or fail to respond to disputes. Because all enforcement is handled through BitVMX-compatible scripts, the mechanism retains the trust model of Bitcoin while enabling decentralized governance and incentivized security.

Validator rewards vary depending on the protocol, but they generally include transaction fees, MEV capture, and protocol subsidies. These incentives create a yield opportunity for technically skilled users and institutional node operators who can reliably perform verification tasks.

Comparison with Ethereum DeFi Yields

While Bitcoin-native DeFi is still in its early stages, yield opportunities on Bitcoin Layer-2s are becoming increasingly competitive with their Ethereum counterparts. On Ethereum, yields are typically denominated in ERC-20 tokens, subject to market volatility, impermanent loss, and composability risks. Bitcoin Layer-2s aim to provide similar or better returns using native BTC, often with fewer intermediaries and less systemic risk.

For example, BTC-denominated lending may offer annualized yields between 2–6%, depending on market conditions and borrower demand. Liquidity pools on Layer-2 DEXs may generate similar returns from trading volume, while validator incentives can range from 3–10% depending on protocol activity. These figures are still evolving, but the early data suggests that Bitcoin-native DeFi can offer sustainable and risk-adjusted returns to long-term holders.

Risk Matrix and Considerations

As with all DeFi ecosystems, Bitcoin-native yield strategies involve a range of risks. Smart contract bugs remain a leading concern, especially as developers transition from traditional Bitcoin scripting to BitVMX-based virtual machines. Because dispute resolution is time-dependent, short or poorly managed challenge periods could allow malicious actors to exploit the system.

Bridge risk is also relevant, particularly if vaults are not properly audited or if external oracles are used to govern token issuance. While BitVMX reduces reliance on custodians, it does not eliminate the need for honest validators and reliable infrastructure.

Market risk, including price volatility, illiquidity, and exit delays, is inherent in any yield-bearing strategy. Users must weigh the potential return against the loss of immediate liquidity or exposure to impermanent loss in AMM pools.

Finally, regulatory risk is emerging as a material factor. Protocols that issue tokenized RWAs or offer lending services may face legal scrutiny, especially if they operate without licenses or clear jurisdictional compliance. Layer-2 protocols must build governance frameworks that accommodate KYC, AML, and auditability where appropriate.

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