The decentralized finance (DeFi) ecosystem on the Sui blockchain is experiencing notable growth and diversification in the second quarter of 2025. Total value locked (TVL) on Sui has sustained levels above $2 billion, with trading volume increasing by 30% quarter-over-quarter. Key developments include breakthroughs in Bitcoin-based finance (BTCfi), institutional adoption marked by the launch of the 21Shares US Bitcoin ETF, and increased retail engagement through platforms such as xMoney and xPortalApp. Additionally, Sui's native token, $SUI, has surged approximately 65% from June lows, with stablecoin trading volumes surpassing those on Solana. The integration of tBTC has introduced $500 million in Bitcoin liquidity into Sui's DeFi ecosystem, contributing to positive market momentum and speculation that $SUI could soon reclaim the $4 price level. Meanwhile, the broader DeFi market has also seen a substantial increase, with total TVL rising over 46% since April to exceed $126 billion. Ethereum leads this growth with a 59% increase in TVL, followed by Solana with a 50% rise.