Rollkit (formerly Rollmint), a modular Rollup framework product under the modular blockchain Celestia, announced support for Bitcoin Sovereign Rollup, allowing Rollkit Rollup to use Bitcoin's data availability. Developers can create Rollups with arbitrary execution environments, inheriting Bitcoin's data availability guarantees and security guarantees. With this integration, EVM can be run on Bitcoin as Rollkit Sovereign Rollup, expanding the possibilities of Rollup and helping to launch a healthy block space fee market on Bitcoin, ensuring a more sustainable security budget.