Crypto Income Case Study 2026: How This DeFi Portfolio Generated $2,400/Month in Passive Yield

In early 2025, a seasoned DeFi user (let’s call him “Alex”) deployed $60,000 across four protocols with the goal of generating consistent monthly passive income without active day‑trading. By mid‑2026, the portfolio was producing $2,400 per month — a 48% annualised yield. This case study pulls back the curtain on exactly how the portfolio was built, which protocols were used, the unexpected incidents that occurred, the true cost of gas fees, and the tax strategy that preserved most of the gains. Whether you’re new to DeFi or a seasoned yield farmer, the lessons here are directly applicable to your own strategy.

📊 Portfolio Allocation & Risk Tiers

Alex structured the portfolio with three risk buckets: Low Risk (35%), Medium Risk (45%), and High/Variable Risk (20%). The goal was to maintain a base yield of at least 15% from low‑risk assets while using higher‑yield positions to pull the total APY to 48%.

Each allocation was chosen for its risk/return profile and the composability across networks (Arbitrum for Aave and sUSDe, Ethereum mainnet for Pendle and Convex). Alex kept a separate $4,000 “gas & emergency” wallet on Arbitrum to cover transaction fees without disrupting compounding.

🏦 Aave v3 Lending (Low‑Risk Tier)

The $21,000 in Aave v3 on Arbitrum was split 60/40 between USDC and ETH. The USDC portion earned supply APY from utilisation demand, while ETH lending captured staking rewards plus a small utilisation premium. At the time of deployment, Aave v3 on Arbitrum offered stable yields between 6% and 9% depending on utilisation.

Alex used the supply only strategy — no borrowing — to keep risk to a minimum (only smart contract risk, no liquidation risk). The yields came from:

• USDC: 7.1% APY (mostly from borrow demand on the pool)
• WETH: 5.3% APY (underlying staking yield + utilisation)

Every two weeks, Alex claimed the earned interest and manually reinvested it into the same lending pool. The total net yield from this tier after gas was approximately $172/month.

For a deeper explanation of Aave’s efficiency mode and isolation pools, read the full Aave v3 guide (2026).

📈 Pendle Fixed Yield (Medium‑Risk Tier)

The $15,000 allocated to Pendle Finance was used to buy Principal Tokens (PT) of sUSDe with a maturity of December 2026. PTs trade at a discount to the underlying asset and converge to par at maturity, effectively locking in a fixed yield. In this case, the implied yield was 22% APY — significantly higher than holding sUSDe directly.

Why not just stake sUSDe? Because the variable yield on sUSDe fluctuates with funding rates (discussed in the next section). Alex wanted a guaranteed return on part of the portfolio, even if funding rates turned negative. PTs offered that certainty.

The mechanics:

• Bought PT sUSDe on Pendle at a 16% discount to the underlying.
• At maturity (Dec 2026), each PT can be redeemed 1:1 for sUSDe (which itself can be unstaked for USDe).
• The effective APY of 22% was locked regardless of what happens to Ethena’s funding rates in the interim.

Monthly “income” from this tier was not paid out as cash; instead, the value of the PTs increased as they approached maturity. Alex tracked this as unrealised gain and planned to realise it at maturity. For a full explanation of the yield‑splitting mechanism, see our Pendle Finance fixed yield guide.

💧 Convex Finance Liquidity Pool (Medium‑High Risk)

The $12,000 in Convex Finance was deposited into the Curve tricrypto LP (USDC/WBTC/WETH) on Ethereum mainnet, then “boosted” through Convex. Curve’s tricrypto pool is a volatile‑asset pool that generates trading fees and CRV rewards. Convex boosts those CRV rewards by locking CVX and vlCVX, significantly increasing the APY for LPs.

At the time, the total APY on this pool (base fees + CRV + CVX boost) was around 34%. However, this came with impermanent loss (IL) risk because the three assets have different price correlations. Over the 14 months of the case study, IL reduced the net return by approximately 4% (bringing effective APY to 30% before gas).

Alex rebalanced the LP position monthly, adding or removing liquidity to keep the three assets in equal proportion. The Convex position alone generated roughly $300/month after accounting for IL and gas. For an in‑depth explanation of how IL works and when it’s worth it, read Impermanent Loss Explained (2026).

🪙 sUSDe Staking (Variable Yield Tier)

The final $12,000 was used to mint USDe (Ethena’s synthetic dollar) and stake it for sUSDe. sUSDe earns yield from Ethena’s delta‑neutral position (long spot ETH + short ETH perpetuals), which captures funding rates paid by leveraged traders. In 2025–2026, funding rates averaged between 15% and 28%, with occasional spikes above 40% and dips as low as 5%.

Alex chose to hold sUSDe directly rather than using Pendle PTs for this portion because he wanted to keep some exposure to variable yield spikes. During months when funding rates were high (e.g., March 2026 with 32% annualised), this tier produced nearly double the yield of the Pendle fixed tier.

However, there is a risk: if funding rates turn negative, sUSDe yields can drop to zero or even become negative (though Ethena’s reserve fund historically absorbed negative periods). To mitigate this, Alex monitored funding rates weekly and had a rule to move funds from sUSDe to Aave if the 30‑day moving average of funding rates fell below 8%.

For a detailed risk assessment of Ethena’s model, see our USDe (Ethena) deep dive and stablecoin yield safety comparison.

🔄 Monthly Rebalancing Routine

Every 30 days, Alex performed a 90‑minute rebalancing session:

1. Harvest all rewards – Claimed Aave interest, Convex CRV/CVX rewards, and sUSDe staking yields. Pendle PTs were left untouched (no interim cash flow).
2. Convert to USDC – Swapped all harvested tokens (ETH, CRV, CVX, etc.) to USDC using a low‑slippage DEX (Uniswap or 1inch).
3. Reallocate according to target percentages – If a protocol had drifted above or below its target weight, Alex moved USDC accordingly.
4. Reinvest in the same protocols – Added to Aave lending, Pendle PTs (if new PTs with attractive yields were available), Convex LP, and sUSDe staking.
5. Record everything in a spreadsheet – Tracked token prices, gas spent, and net yield for tax purposes.

This routine took about 90 minutes per month and cost an average of $18 in gas fees ($12 on Ethereum L1 for Convex/Pendle, $6 on Arbitrum for Aave/sUSDe).

⚠️ Two Protocol Incidents & How They Were Handled

No DeFi case study is complete without mentioning real risks. Alex encountered two notable incidents:

Incident #1: Aave v3 configuration warning (Sept 2025)

Aave governance temporarily paused borrowing on one of the Arbitrum pools due to a configuration issue that could have led to inaccurate interest rates. The lending side remained unaffected, but Alex could not claim or supply additional funds for 6 days. No funds were lost, but it highlighted the importance of monitoring governance channels. Alex’s lesson: always have a secondary withdrawal route (in this case, funds could still be withdrawn, just not supplied).

Incident #2: Convex UI exploit (Jan 2026)

A third‑party front‑end exploit targeted Convex’s website, tricking users into signing a malicious approval. Alex used a hardware wallet and always verified contract addresses via Etherscan before signing. He lost no funds, but the incident forced him to revoke all token approvals and reconnect. Total downtime: 2 days while he manually reset approvals using Revoke.cash. For a guide on protecting against such attacks, read wallet drainer attacks & approval revocation.

⛽ Gas Costs & Net Yield Impact

Over 14 months (Feb 2025 – Apr 2026), Alex spent a total of $312 on gas fees:

• $204 on Ethereum mainnet (Pendle + Convex transactions)
• $108 on Arbitrum (Aave + sUSDe + USDC bridging)

That represents 0.52% of the initial capital or approximately 1.1% of the gross yield. Net yield after gas was $2,373/month on average (down from $2,400 gross), resulting in a net APY of 47.5% — still excellent.

Gas costs were minimised by batching transactions and performing rebalancing during low‑congestion hours (weekend mornings UTC).

📄 Tax Management Across Five Protocols

DeFi taxes are notoriously complex. Alex used Koinly connected to his wallets and exchange accounts to track every transaction. The key challenges were:

• Aave lending interest – Taxed as ordinary income at the time of receipt (value in USD when claimed).
• Convex rewards (CRV/CVX) – Also ordinary income upon claiming. However, the LP position itself was treated as a “pool of assets” – adding/removing liquidity triggered capital gains/losses on the underlying tokens.
• sUSDe staking – Ethena’s rebasing token meant that each day’s yield was considered income at that day’s price. Alex used a CSV export from the Ethena dashboard to track daily accruals.
• Pendle PTs – No taxable event until maturity or sale. At redemption, the gain (redemption value minus purchase cost) is treated as capital gain (likely long‑term if held >1 year).

Alex set aside 25% of all harvested yield in a separate USDC account to cover estimated taxes. At the end of the year, his tax bill was roughly $7,200 (on $28,800 gross yield). For a full breakdown of DeFi tax rules, see DeFi Tax in 2026: IRS Treatment of Yield, Liquidity Pools, and Swaps and crypto tax software comparison.

🧠 Key Lessons & Risk Warnings

Alex’s case study is not a guarantee of future returns. Here are the most important takeaways:

• Diversify by risk tier. Putting everything into high‑yield pools (like Convex LP) would have exposed the portfolio to impermanent loss and smart contract risk without a stable base.
• Gas costs are real but manageable. On L2s like Arbitrum, even dozens of transactions cost less than $10/month. Ethereum L1 requires batching.
• Incidents will happen. Plan for downtime, revoke approvals, and never invest money you can’t afford to lose.
• Tax planning is not optional. Set aside estimated taxes monthly. Use a dedicated tracking software from day one.
• Yields change quickly. The 48% APY achieved in this case study was partly due to favourable market conditions (high funding rates, strong DeFi incentive programs). Always re‑evaluate your positions quarterly.

❓ Frequently Asked Questions