Decentralized finance or DeFi ecosystems are still suffering through crypto winter, according to the analysis firm Messari. As a whole, the industry’s total value locked, or TVL – a key metric that represents collateral and deposits put into blockchain protocols – has been declining. On Ethereum, by far the biggest DeFi ecosystem, TVL dropped by 13% drop to $23 billion over the past 30 days. Optimism and Solana eked out gains.