You supply 0.05 BTC to a "Bitcoin yield" market on Base, confirm one cheap transaction, wait a year. On October 2, 2026 the live Aave v3 Base cbBTC supply rate was 0.009%. At BTC near $83,800, 0.05 BTC ≈ $4,190 — twelve months pays roughly $0.38. Not 0.38 BTC, not $38. Thirty-eight cents. I rechecked twice; it feels like a typo.
It is not a typo. Seeing why that rate is real — and where the 3–5% rates sit — is the whole game of earning on bitcoin without selling. Below: the three conflated strategies, cbBTC/WBTC/tBTC as liability claims, the real 0.05 BTC math, and a Base playbook whose exit does not cost a year of yield. Education, not financial advice; wrapped bitcoin is always a claim on someone else's keys.
TL;DR. Supplying wrapped BTC on Aave or Morpho paid roughly 0.00–0.02% APY in Sep–Oct 2026 — about $0.38 per year on 0.05 BTC (~$4,190). Bitcoin's DeFi value is collateral, not income: borrowers pay 3.3–5% for stablecoins against BTC; USDC lenders into BTC-collateralized Morpho markets earn about 4.4%. Wrapper choice beats rate-chasing: cbBTC is free but Coinbase-gated with freeze powers, WBTC merchant-only, tBTC permissionless but 0.4% round-trip. Pick your redemption route before your venue.
Why bitcoin pays nothing by default: three routes
Bitcoin mints no coupon and pays no interest, so every "yield on BTC" product re-routes one of three cash flows:
- Supply wrapped bitcoin (~0%). Wrap BTC and deposit; with almost no bitcoin borrowing demand, utilization and interest sit near zero. The $0.38 route.
- Borrow stablecoins against bitcoin (3.3–5% cost). Deposit wrapped BTC and borrow USDC/USDT — paying for liquidity without selling, or leverage — the engine of BTC-collateralized markets.
- Lend stablecoins into BTC-collateralized markets (~4.4%). On October 1, 2026 the dominant Morpho Base USDC/cbBTC market held about $1.48B outstanding: 4.90% to borrowers, ~4.40% to USDC suppliers, 86% max LTV. Bitcoin is collateral; dollars earn yield.
When an app promises "up to 5% yield on bitcoin," check your side: supplying BTC, borrowing against it, or supplying the stablecoin. The label is marketing; the cash flows are not.
cbBTC vs WBTC vs tBTC: the wrapper table that matters
The token you supply is not bitcoin — it is an IOU from a system. The wrappers differ on who holds keys, who can freeze your address, how native BTC is redeemed, and what happens when a big platform drops the token (late Aug–Sep 2026 figures).
| Wrapper | Custody & controls | Mint / redeem | Supply, chains & events |
|---|---|---|---|
| cbBTC launched Sep 12, 2024 |
Single Coinbase custodian; per-address isBlacklisted, global pause; OpenZeppelin-audited. |
Free, near-instant mint/redeem for verified Coinbase users. | 95,776.08 per Proof of Reserves: Base 46,771.6; Ethereum 45,995.5; Solana 2,937.4; Arbitrum 71.6. Ethereum, Base, Solana, Arbitrum, Monad (via CCIP, Mar 2026). |
| WBTC | BitGo tri-key custody since Aug 2024: BitGo US, BitGo Singapore, BiT Global (HK) holds 2 of 3 keys. | Merchant-only KYC; mint/redeem log idle since Jun 7, 2026 — most exits run via DEX or CEX. | 116,499.20 WBTC vs 116,512 BTC reserves (Aug 27, 2026); 99.685% on Ethereum; −8.9% YoY. Sky offboarded after an 88.17% vote (Sep 19, 2024); Coinbase delisted (Dec 19, 2024). BitGo OCC charter (Dec 2025), NYSE IPO as BTGO (Jan 2026); $7.3–7.4B cross-chain ops moved LayerZero→CCIP (Aug 4, 2026). |
| tBTC | Threshold Network; permissionless rotating signer groups, 51-of-100 threshold ECDSA, no single custodian; never compromised since 2020. | 0.2% mint + 0.2% redeem; 0.01 BTC minimum; ~1–2h per mint; redeems to self-custody. | ~$220M mcap (Apr 2026); Ethereum-native with bridged L2 deployments and thinner liquidity. |
Read custody before supply: a large token is not automatically one you can exit — your exit depends on the issuer's gate. I verify every contract address officially; counterfeit cbBTC/WBTC tickers remain a boringly effective scam.
What changed since 2024
The WBTC custody saga explains this table. In August 2024 WBTC moved to BitGo's tri-key arrangement; weeks later Sky (MakerDAO's successor) voted 88.17% on September 19, 2024 to offboard it, and Coinbase delisted WBTC on December 19, 2024 while scaling cbBTC (launched September 12 that year). WBTC survived — OCC charter December 2025, NYSE listing as BTGO in January 2026 — but supply fell 8.9% YoY by August 27, 2026 and retail exits shifted to DEX/CEX; within two years cbBTC took most Base activity. tBTC stayed unglamorous: 51-of-100 signers, ~$220M mcap in April 2026, no compromise since 2020. The trust-model choice is genuine, not settled.
Where bitcoin lending lives in late 2026
On Ethereum, Aave v3 lists WBTC, cbBTC and tBTC collateral, with Aave v4 deployments rolling out in late 2026 without changing the rate picture. On Base, Aave v3 and Morpho dominate; cbBTC is the default wrapper — 46,771.6 of 95,776 cbBTC, nearly half, sits there. Mechanics: the Aave vs Morpho guide, the Aave and Morpho reviews.
October 1, 2026 borrow snapshot: Morpho Ethereum cbBTC→USDT 3.29%; Aave Arbitrum WBTC→USDC 3.88%; on Base, Morpho cbBTC→USDC 4.80% (Sep 25), Aave v3 Base 4.83%. Risk direction matters: on September 21, 2026 LlamaRisk proposed lifting WBTC/cbBTC LTV on Ethereum Core 73%→81%, citing 2,621 BTC ($358M) liquidated Aug 2025–Aug 2026. Higher LTV, more cascades; suppliers underwrite the tail.
The real 0.05 BTC math
0.05 BTC ≈ $4,190 at September 25–29, 2026 prices near $83,800 (ATH $125,954, October 6, 2025). Income = position × APY; the CEX row is custody, not DeFi.
| Option for 0.05 BTC | Rate (dated) | Annual $ | Note |
|---|---|---|---|
| Aave v3 Base, cbBTC supply | 0.009% (Oct 2, 2026) | $0.38 | Pure route-1 supply |
| Aave v3 Ethereum, WBTC supply | 0.003% (Oct 2, 2026) | $0.13 | L1 gas dwarfs a year of interest |
| Aave v3 Ethereum, tBTC supply | 0.000% (Oct 2, 2026) | $0.00 | No borrowing demand |
| Morpho cbBTC vault, Base | ≈0.00% (Oct 2026) | ~$0.00 | Idle collateral market |
| Venus, BNB Chain, BTCB | 0.196% (Oct 2026) | $8.21 | Different chain and wrapper |
| Bybit flexible BTC (CEX) | ~0.10% (Oct 2026) | ≈$4.95 | The exchange holds your keys |
| tBTC wrap round-trip | 0.4% fee | −$16.76 | 0.2% mint + 0.2% redeem |
| Base deposit + exit gas | — | cents | A few txs |
The formula behind the zeros: supplier APY ≈ borrow rate × utilization. On August 27, 2026 utilization was 3.67% (WBTC), 0.60% (cbBTC) and 91.49% (USDC); a 5% borrow rate at 0.6% utilization pays 0.003%. The same market from the USDC side — Morpho Base USDC/cbBTC, $1.48B outstanding, 4.90% borrow, 86% LTV — pays 4.40%. Scan rates in the yield discovery tool.
The fee trap is the exit: $16.76 tBTC round-trip against $0.38 earned is a 44-year payback. cbBTC wins small Base positions on free Coinbase redemption, not yield — the exit decides sanity.
The three strategies people confuse
When people say "I want yield on my bitcoin," they mean one of three transactions. Name yours:
- Supply BTC (~0%) — optionality. Park BTC as ready collateral with no income expectation — cash in a prime brokerage. Reasonable; call it positioning.
- Borrow stables against BTC (3.3–5%) — liquidity. Dollars for a tax bill, a deployment or leverage without selling. The rate is a cost and liquidation risk is yours — model it on the yield calculator before treating debt as free.
- Lend USDC to BTC borrowers (~4.4%) — the actual yield. Hold stables, underwrite BTC-collateralized loans; you earn cash flow but take oracle, liquidation and issuer risk plus depeg risk — the stablecoin depeg guide.
Only the third pays meaningful income; if income is the goal, fund BTC borrowers with stables.
A 0.05 BTC Base playbook, end to end
This mirrors our exchange-to-DeFi walkthrough; break-even gas math is in gas fees vs yield, venues in the Base DeFi yield guide.
- Acquire. Buy 0.05 BTC plus a little Base ETH on a venue allowing BTC withdrawal to self-custody.
- Withdraw to your own wallet. Never send exchange BTC straight into a protocol; keep a self-custody address in between with a little Base ETH for gas.
- Wrap or bridge. On Base, mint cbBTC via Coinbase or a canonical bridge; treat every other bridge as its own risk — the bridge safety guide.
- Deposit. Supply cbBTC to Aave v3 Base or a curated Morpho market after checking curator, oracle and withdrawal queue — the yield risk grader walks those checks.
- Monitor. Watch utilization, health factor if borrowing, and wrapper news; set alerts above any liquidation price.
- Exit. Test redemption with dust — cbBTC to Coinbase to BTC, timed — then size so a queue is only an inconvenience.
Where to get BTC, step 1. The partner below supports BTC withdrawals to self-custody and cheap paths to Base. Signing up here supports DifiCalc at no extra cost to you — see our affiliate disclosure.
Self-custody, step 2. Collateral parked for months belongs on a hardware wallet, not a browser seed phrase. DifiCalc earns a commission via the button below at no extra cost to you; the advice stands alone — see our affiliate disclosure.
Risk checklist: every step has an incident attached
Dated losses, not abstract categories — the table I read before depositing:
| Risk | Evidence (dated) | What I do |
|---|---|---|
| Custodian concentration | cbBTC is a single-Coinbase claim; one legal or operational event hits all chains at once. | Pick the trust model I could survive; split wrappers on material amounts. |
| Asset freezing | cbBTC has isBlacklisted plus a global pause; an issuer can freeze an address even inside Aave. | Assume compliant wrappers can freeze addresses; keep emergency funds unwrapped. |
| Redemption-route risk | Coinbase delisted WBTC Dec 19, 2024; Sky offboarded after an 88.17% vote Sep 19, 2024; WBTC merchant log idle since Jun 7, 2026. | Verify a live 1:1 route before minting; a DEX price is not redemption. |
| Bridge / message risk | KelpDAO lost $292M Apr 18, 2026 via a 1-of-1 LayerZero DVN; Wormhole $322M and Nomad $190M in 2022; renBTC holders stranded when Ren shut down. | Minimize bridge dwell time; prefer canonical/CCIP routes; pre-fund gas. |
| Protocol / oracle / liquidation | LlamaRisk's Sep 21, 2026 backtest: 2,621 BTC ($358M) liquidated Aug 2025–Aug 2026; the 81% LTV proposal raises cascade risk. | Borrow well below max LTV; check oracle and curator; size for panic days. |
| CEX custody | Bitget lost $387.5M on Sep 24, 2026; BTC withdrawals froze for four days. "Flexible yield" pays for this exposure — I do not park BTC there. | Withdraw promptly after buying; I do not outsource custody to chase yield. |
| Counterfeit tickers | Fake cbBTC/WBTC pairs and phishing airdrop tokens mimic the real wrappers. | Verify contracts against official docs and Proof of Reserves; ignore unsolicited tokens. |
The bigger picture: bitcoin in DeFi is still tiny
Zoom out: the market is honestly priced. Bitcoin-anchored DeFi TVL was about $4.39B on September 18, 2026 — roughly 91,000 BTC, 0.46% of supply. Native staking agrees: Babylon held 39,040 BTC staked as of August 27, 2026 at 0.0429% average APR, TVL down 56% from peak. Demand is for BTC exposure and dollar liquidity, not BTC-denominated income; the rates say so.
Calibrate: markets can pause, oracles misprice, issuers freeze addresses, and 0.009% APY compensates for none of it. I use these positions for collateral optionality and stablecoin income, diversify via our best lending protocols, and treat high raw-BTC rates as a different product. Dated education, not financial advice — do your own diligence; deploy only funds you could leave queued a week.
Sources and further reading
- Coinbase — cbBTC Proof of Reserves — per-chain supply backing (95,776.08).
- Threshold Network — tBTC v2 docs — signer model, 0.2% fees, minimums, timing.
- WBTC — Transparency — reserves vs supply, tri-key custody, merchant log.
- DeFi Rate — Bitcoin lending snapshot, Oct 1, 2026 — the venue rates used above.
- Chainalysis — KelpDAO bridge exploit, April 2026 — the $292M loss and 1-of-1 DVN failure.
- L2BEAT — rollup and bridge risk per network.
Frequently asked questions
Can I earn yield on Bitcoin without selling it?
Yes, but barely. Wrap BTC into cbBTC, WBTC or tBTC and supply it on Aave or Morpho; on October 2, 2026 those supply APYs ran 0.000–0.02%, with Venus on BNB Chain the best large venue at 0.196% on BTCB. Meaningful cash flow instead comes from borrowing stablecoins against your BTC or lending stablecoins into BTC-collateralized markets.
What is the difference between cbBTC, WBTC and tBTC?
cbBTC is Coinbase-backed wrapped bitcoin with one custodian, free mint and redeem for verified Coinbase users, an address blacklist and a global pause, with about 95,776 BTC in supply in October 2026. WBTC uses BitGo tri-key custody, mints and redeems only through merchants, and held about 116,512 BTC in reserves on August 27, 2026. tBTC is Threshold's permissionless signer-threshold wrapper charging 0.2% each way.
Why is cbBTC/WBTC supply APY on Aave and Morpho near zero?
Because lending rates follow borrowing demand: supplier APY is roughly the borrow rate multiplied by utilization. On August 27, 2026 WBTC utilization was 3.67% and cbBTC just 0.60%, against 91.49% for USDC. Almost nobody borrows bitcoin; traders borrow stablecoins against bitcoin collateral, so the cash flow lands on the stablecoin side.
Is lending 0.05 BTC on Base worth it?
Operationally yes, financially no. Base gas is cents per deposit and the position stays usable as collateral, but at Aave v3 Base's 0.009% supply rate on October 2, 2026, 0.05 BTC worth about $4,190 earns roughly $0.38 per year. Treat it as collateral positioning and optionality, not income; wrapping via tBTC at that size costs more in fees than years of yield.
Can I always redeem wrapped BTC 1:1 for native Bitcoin?
No; redemption routes differ. cbBTC redeems free and instantly only for verified Coinbase users. WBTC redemption runs through a merchant-only KYC channel whose log has been idle since June 7, 2026, so most holders exit via a DEX or exchange. tBTC redemption is permissionless to self-custody wallets, costs 0.2%, takes roughly 1–2 hours and needs at least 0.01 BTC; delistings happen, so verify your exit before wrapping.
Find where the yield actually is
Scan live supply, borrow and utilization across Base and Ethereum — and read BTC-collateralized markets from the stablecoin side.
Open Yield DiscoveryRelated: move first coins with from exchange to DeFi; compare venues in Aave vs Morpho and the Aave and Morpho reviews; continue with Base DeFi yield, bridge safety and stablecoin depeg risk. Vetted venues: best lending protocols.