$USDD was the fastest-growing stablecoin in the past week. At first look, it may seem like a spike from a campaign or yield boost, but there's actually more to it. @USDDecentralize has spent years building an ecosystem around two things: earning yield & making stablecoin transfers cheaper. USDD is now earning ~4% APY natively for its holders. USDD's Smart Allocator puts reserves to work across blue-chip protocols like @aave, @sparkfinance, and @Morpho, earning interest from borrowers and additional protocol rewards. That revenue is redirected to support the yield. Meanwhile, GasFree allows USDD transfers on TRON without holding TRX, at 0.5 USDD per transaction versus 1.5 USDT for USDT through GasFree. Add here Binance, Gate, and JustLend distribution, and you get a self-sustaining growth engine with each piece supporting the other. Yield gives users a reason to hold USDD, while cheaper transfers make it useful beyond simply sitting in a wallet. That's a more interesting growth model than attracting deposits with high APYs alone. Since its expansion from TRON to Ethereum, Ethereum now accounts for 26% of USDD's supply, which gives it another substantial market to attract stablecoin holders beyond TRON's ecosystem. Definitely a top contender for the top stablecoin spot as a decentralized alternative to Tether and Circle.