The project I'm tracking, Citrea, is live on mainnet http://app.citrea.xyz The investment backing looks decent, with FF + Galaxy. Citrea is the first Bitcoin Layer 2 network powered by ZK technology. The core focus is integrating BTC collateral into the full DeFi and payments ecosystem. One highlight of Citrea is its native USD stablecoin, ctUSD, issued by MoonPay. M0 provides the infrastructure, and it's 1:1 pegged to cash and short-term US Treasury bonds—it's not a cross-chain asset. For the activity they're promoting, you just need to track 6 points: bridging, liquidity provision, trading, lending, and other DeFi actions. Honestly, I haven’t made much money in the BTCFi space. The whole sector hasn’t really had any decent wealth opportunities. Ever since Babylon messed up, the entire sector has basically been wiped out. Let’s just keep an eye on this for now.