Stablecoins are a $305.6B market. Four projects offer very different ways to capture that growth.
Here is how I would map Sky, Ethena, Aave and Pendle as of September 7, 2026.
1.
@SkyEcosystem: earn the spread
Sky earns interest and income from the assets and credit supporting its dollar system. The economic opportunity is to grow USDS while keeping asset income ahead of savings payouts and other costs.
DefiLlama tracks $13.51M in protocol revenue and $2.91M in holder revenue over 30 days. Protocol surplus already supports SKY buybacks and staking rewards.
Watch USDS growth alongside the surplus retained per dollar. Expensive deposits can grow a stablecoin without improving its economics.
2.
@ethena : scale the yield engine
Ethena generates income through USDe's backing assets and hedging strategy. That income also funds sUSDe returns and distribution, so the amount available for ENA depends on how revenue is allocated.
USDe currently has roughly $4.37B in circulation. The August 27 fee-switch proposal places the first buyback threshold at $7.5B, with 95% of net revenue paid to the Foundation from its core business lines earmarked for buybacks once activated.
The opportunity is conditional: grow USDe, preserve competitive yields and turn the fee framework into executed token purchases.
3.
@Aave: monetize borrowing demand
Aave earns a share of the interest borrowers pay. More stablecoins become economically useful when borrowers actually draw on that liquidity.
It recorded $4.57M in 30-day protocol revenue. AAVE buybacks were paused in April, and DefiLlama records zero holder revenue for the current 30-day window.
The business can keep earning while token purchases pause. Watch stablecoin borrowing, utilization and confirmed buyback resumption.
4.
@pendle_fi : build markets around yield
Pendle lets holders separate principal from future yield, creating markets for fixed returns and changing yield expectations across different issuers.
Pendle V2 allocates 80% of protocol fees after the LP allocation to PENDLE buybacks, with repurchased tokens supporting eligible sPENDLE holders. DefiLlama tracks approximately $521K in holder revenue over 30 days.
Its opportunity grows when more yield-bearing assets find active markets on Pendle. The relevant signals are yield fees, trading activity and recurring demand across maturities.
The financial figures above cover whole protocols under DefiLlama's definitions. They are not a measure of stablecoin-only profit.
My research priority would be SKY and PENDLE for cash flow already reaching tokens, AAVE for borrowing demand, and ENA for conditional fee activation.
A growing market creates opportunity. The token thesis depends on how much of that opportunity it can actually retain.