Layer 1

Layer 1 refers to a blockchain's foundational base layer—the core network that handles transaction validation, consensus, and final settlement without relying on any external chain. Bitcoin, Ethereum, Solana, Cardano, and Avalanche are all Layer 1 blockchains. Every transaction processed by these networks achieves finality on their own infrastructure, secured by their native validator or miner sets. The Layer 1 designation became important as the blockchain ecosystem expanded. Developers began building secondary networks—Layer 2s—on top of base chains to improve speed and reduce fees. This created a layered architecture where Layer 1 provides security and decentralization, while Layer 2 solutions handle throughput. Understanding this distinction helps users know where their assets ultimately settle and what security guarantees they inherit. Layer 1 blockchains face the blockchain trilemma—the challenge of simultaneously achieving decentralization, security, and scalability. Bitcoin prioritises security and decentralization at the cost of throughput. Solana optimises for speed but accepts tradeoffs in decentralization. Ethereum pursues a balance through proof-of-stake consensus and Layer 2 offloading. Each Layer 1 requires its native coin for transaction fees. ETH is required on Ethereum, SOL on Solana, and ADA on Cardano. This creates fundamental demand for Layer 1 coins tied directly to network usage. When applications, DeFi protocols, and NFT platforms grow on a Layer 1, demand for the native coin increases. Comparing Layer 1 blockchains requires evaluating consensus mechanism, decentralization metrics, transaction throughput, fee structures, developer ecosystem, and historical security track record—not just raw speed or marketing claims. Layer 1 blockchains face a fundamental design challenge known as the blockchain trilemma: achieving scalability, security, and decentralisation simultaneously is extremely difficult. Increasing throughput typically requires either larger validator hardware requirements (reducing decentralisation) or relaxing consensus security. Ethereum chose to prioritise security and decentralisation at the base layer, accepting lower throughput and higher fees while delegating scalability to Layer 2 solutions built on top. Solana made the opposite trade-off — high throughput with faster consensus — at the cost of higher hardware requirements for validators, leading to a more concentrated validator set and several network outages under extreme load. Competition among Layer 1 blockchains is decided largely by developer adoption rather than technical specifications alone. Ethereum's dominant advantage is its established ecosystem: the largest DeFi TVL, the most widely deployed smart contract standards, and the deepest developer tooling. Competing Layer 1s attract developers with EVM compatibility (allowing Ethereum code to run with minimal modification), lower fees, and grant programmes. Network effects compound over time — applications, users, and liquidity reinforce each other, making incumbent chains increasingly difficult to displace regardless of technical improvements. Staking is central to the economics of modern Proof-of-Stake Layer 1s. Validators lock up the native token as collateral to participate in block production, earning newly issued tokens and transaction fees as rewards. The staking yield affects token supply dynamics and investor behaviour: high yields attract capital but increase issuance, potentially diluting holders. Networks like Ethereum have implemented token-burning mechanisms to offset issuance, making net supply impact a function of on-chain activity levels. When fee revenue is high enough that burns exceed issuance, the asset becomes deflationary.