Bitcoin is secure, no doubt, but most of the time it just lies there quietly. Want to take it to DeFi for Mining or jump to other public chains to try? Usually, you have to rely on wrapped versions, cross-chain bridge solutions, or you can only watch opportunities slip away. The emergence of cross-chain technology has changed this - BTC, BRC-20 assets, and even emerging assets like Runes now have more flexible liquidity. No longer constrained by a single ecosystem, assets can circulate across multiple chains, opening up the possibilities of DeFi.