Layer 2 scaling secures $36 billion on Ethereum, Arbitrum TVL falls

Ethereum’s second‑layer networks now lock roughly $36 billion in value across thousands of dApps, while Base’s total value locked (TVL) has climbed to $4.94 billion, edging out Arbitrum’s $4.03 billion as of June 13 2025【1】. The shift underscores growing confidence in L2 scalability and hints at where capital is flowing.

Why L2s matter now

Layer‑2 protocols batch hundreds to thousands of transactions off‑chain and post only a cryptographic proof to Ethereum, delivering 10‑100× higher throughput than the base layer’s 15‑20 TPS. This architecture has slashed average L2 fees to below $0.05, with some proofs costing as little as $0.0196 post‑Dencun upgrade【1】. The dramatic fee drop has spurred migration of everyday payments, micro‑trades, and NFT minting to L2s, preserving Ethereum’s security while achieving Visa‑scale capacity.

Competitive landscape

Arbitrum remains the largest L2 by daily transaction count, hitting a record 5 million daily tx in December 2023, yet its TVL has been overtaken by Base, which now holds $4.94 bn versus Arbitrum’s $4.03 bn【1】. Other rollups such as zkSync Era and Polygon zkEVM continue to grow, with Polygon reporting a 63 % QoQ transaction increase in Q1 2025【1】. The competition is driven not just by raw throughput but by ecosystem support, bridge security, and the ability to offer ultra‑low‑cost “social‑media‑style” traffic (e.g., Arbitrum Nova).

Risks and adoption hurdles

Despite the efficiency gains, L2s inherit bridge risk—smart‑contract bridges that move assets between L1 and L2 have historically suffered multi‑billion‑dollar exploits. Centralized sequencers and multi‑sig upgrade keys also introduce partial trust assumptions, especially for Validium designs that keep raw data off‑chain【1】. User experience remains a barrier; newcomers must navigate bridging, RPC switching, and token wrapping, which can deter mass adoption.

What to watch

• Base TVL milestones – watch for the next $0.5 bn increment, which could signal further market share gains over Arbitrum.
• Ethereum Dencun upgrade impact – monitor average L2 fee levels; a sustained ~90 % reduction would reinforce migration trends.
• Bridge security incidents – any major exploit on a L1‑L2 bridge could reshape capital allocation across rollups.

Layer‑2 solutions are now the backbone of Ethereum’s scalability, securing tens of billions of dollars while delivering near‑instant, cheap transactions. The next few months will reveal whether Base’s TVL lead translates into broader ecosystem dominance or if a more fragmented “city‑state” model of specialized L2s persists.