Plain English
Layer 1 is the base blockchain — the foundational network that handles consensus, security, and settlement. Bitcoin, Ethereum, Solana, Avalanche, and BNB Chain are L1s. Anything built on top of them (L2s, sidechains, dApps) inherits or borrows from L1 security.
How it actually works
L1s run their own validator set, their own consensus algorithm (Proof of Work, Proof of Stake, BFT variants), and their own token economy. They make trade-offs across the “blockchain trilemma”: decentralization, security, and scalability. Bitcoin maximizes decentralization and security; Solana optimizes for speed; Ethereum balances all three by outsourcing scale to L2s.
What it means for you
Choosing which L1 to build value on is a multi-year bet. The major L1s with sustained developer activity, deep liquidity, and credible neutrality are the safest core. Newer L1s offer asymmetric upside but historically fade fast if they cannot retain developers and users. For HNW allocations, base weights to L1s by usage trends and tokenomic discipline, not by marketing.
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Educational content only. Not investment, tax, or legal advice.