All along, although Bitcoin has a high value, the sense of participation has actually been poor. It's not that it lacks value, but rather that there is a lack of a complete set of tools suitable for it, especially in the areas of cross-chain and self-custody. @PortaltoBitcoin proposed the concept of a "sovereign stack," which aims to solve this issue: how to allow BTC to truly flow in a multi-chain world without giving up control. This "sovereign stack" is not a new public chain, but rather a complete set of infrastructure built by Portal, which can be broken down into four layers. The bottom layer is BitScaler, a Layer 3 created using Taproot technology, which allows for native swaps between Bitcoin and other chains directly, without bridges or wrapped assets, and is controlled by strategies that can customize rules. The key is that it does not require trust in any intermediaries, relying on cryptographic guarantees. Next is Portal DEX, which is more intuitive, a cross-chain decentralized exchange built on BitScaler. The focus is on native-to-native trading, where BTC can be exchanged for ETH without needing to be converted into wrapped assets like wBTC, nor does it need to be sent to a centralized platform; it is entirely a P2P model, following self-custody logic. Another interesting aspect is the routing and liquidity coordination layer, which uses a hub-and-spoke design to efficiently schedule validators and LPs. This not only saves costs but also avoids many MEV issues, ensuring fair transactions and transparent execution, making the system run more smoothly. Personally, I feel that this layered structure is not a single-point breakthrough, but rather an "ability upgrade" for BTC, transforming it from an asset that can only be hoarded into one that can truly participate in cross-chain DeFi without sacrificing control. This direction feels more like a return to the original intention than purely focusing on performance or new concepts. There is a leaderboard activity on @KaitoAI!!