# BlockchainArchitecture

The rollout of Citrea and its CTR token marks a pivotal moment for Bitcoin scaling layers. As someone who analyzes blockchain architecture, I find Citrea’s dual treasury model fascinating because it creates a sovereign execution environment directly on top of Bitcoin’s base layer. This isn't just another sidechain; it’s a sophisticated Layer 2 that uses ZK-proofs to inherit Bitcoin’s security while enabling smart contract functionality. For developers, this opens up a "Greenfield" for building DeFi on the most secure ledger in history. Infrastructure like this is what will drive the next wave