Expanding from multi-chain to structural differentiation: stablecoin liquidity is reshaping the competition landscape between Solana and Layer 2

The market size of stablecoins first surpassed the $315 billion mark in the first quarter of 2026, despite the overall cryptocurrency market capitalization declining by over 20% during the same period. The countercyclical expansion in the stablecoin sector reveals the continued strengthening of the underlying crypto economic infrastructure layer. More notably, the new liquidity has not been evenly distributed across all blockchains but has shown a high degree of concentration—Solana, Base, and Arbitrum have become the core recipients of stablecoin inflows in this cycle, forming a new pattern of capital rotation within a multi-chain ecosystem. This trend not only reflects the differentiation in technological approaches and application scenarios across chains but also signals a deep evolution in the liquidity distribution logic of the crypto market.

Three Chains Simultaneously Absorb Liquidity

Since late March 2026, on-chain monitoring data shows that the stablecoin balances on Solana, Base, and Arbitrum have been continuously increasing net. As of April 17, 2026, the USDC supply on Solana reached approximately $7.62 billion, with a monthly increase of over $1 billion; the total stablecoin supply on Base was about $4.81 billion, with over 90% being USDC; Arbitrum recorded a cross-chain bridge asset net inflow of about $83.8 million in the past week, ranking among the top in net inflows across public chains.

The phenomenon of these three chains simultaneously absorbing stablecoin inflows occurs against the backdrop of a shrinking overall risk appetite in the crypto market. In the first quarter of 2026, the total crypto market cap declined by approximately 20.4%, but the total stablecoin market cap remained roughly flat at about $309.9 billion, indicating a structural shift from risk assets to safe-haven assets within the market. Under this macro environment, the ability of Solana, Base, and Arbitrum to counter the trend and absorb stablecoin liquidity warrants in-depth analysis.

Macro Background and Key Milestones

Changes in the Stablecoin Landscape: USDC’s Rise and USDT’s First Quarterly Contraction

In the first quarter of 2026, the stablecoin market experienced significant structural changes unseen in the past three years. Tether’s USDT issuance declined by about 1.6% to $184.1 billion, marking its first noticeable quarterly decrease since Q2 2022. In contrast, Circle’s USDC grew by approximately 2.4% to $77.1 billion, continuing its expansion trend since late 2023—during which USDC’s supply increased by about 220%.

The shifting market shares of these two major stablecoin issuers are closely related to regulatory developments. USDC has obtained MiCA compliance approval in Europe, whereas USDT has not yet achieved similar regulatory status, gradually impacting its market presence there. USDC’s transfer volume on Ethereum reached $1.7 trillion in February 2026, a year-over-year increase of about 250%, with USDC accounting for roughly 70% of the total stablecoin trading volume that month—more than double USDT’s trading volume.

Synchronization of Stablecoin Inflows Across Three Chains

From January to April 2026, the inflow patterns of stablecoins across the three chains exhibited distinct characteristics. In January, Base surpassed other Layer 2 networks to become the most active platform for stablecoin transfers, with a supply of $4.81 billion, leading Arbitrum’s $3.75 billion. Solana experienced explosive growth in early April—during the first week, Circle minted about $3.25 billion USDC on Solana, setting a new weekly record for 2026. On April 16, Circle minted another $500 million USDC on Solana, bringing the total USDC minted on Solana in 2026 to $38 billion.

Most stablecoin inflows into Arbitrum are facilitated via cross-chain bridges. In the first week of March, Arbitrum’s cross-chain bridge net inflow reached $616 million, ranking first among all public chains. In the second week of April, it recorded a net inflow of $83.8 million, maintaining a stable capital absorption trend. Over a longer period, Arbitrum’s stablecoin supply has increased by about 80% year-over-year, reaching a peak of $10 billion in October 2025.

Key Data Overview: Scale, Velocity, and Cross-Chain Paths

Cross-Chain Comparison of Stablecoin Sizes

As of mid-April 2026, the core data related to stablecoins across the three chains show the following pattern:

Data source: Aggregated from publicly available on-chain data as of April 17, 2026.

Significant differences exist in how these chains acquire stable liquidity. Solana’s stablecoin growth mainly depends on direct on-chain minting of USDC, reflecting Circle’s direct liquidity deployment in this ecosystem. Base’s stablecoin supply is centered on native USDC, efficiently distributed through deep integration with Coinbase’s ecosystem. Arbitrum’s growth is primarily driven by funds migrating via cross-chain bridges, highlighting its role as an Ethereum Layer 2 settlement layer.

Divergence in Circulation Velocity: Implicit Indicators of Usage Efficiency

Supply volume is not the sole measure of on-chain stablecoin activity; circulation velocity is equally critical. Data shows that USDC on Base has a daily circulation velocity of about 14 times, whereas USDT on Ethereum mainnet is only about 0.2 times. In January 2026, adjusted stablecoin transfer volume hit a record $8 trillion, with most growth concentrated on USDC on Base—about $4.1 billion USDC generated approximately $5.3 trillion in transaction volume that month.

Solana’s stablecoin activity is also notable. Its monthly stablecoin trading volume has exceeded $650 billion, surpassing many traditional payment networks. Active addresses on Solana reached approximately 33.9 million monthly active addresses in early April, with 7-day active addresses around 28.05 million, maintaining a leading position in chain activity.

Arbitrum’s stablecoin activity is also accelerating, with quarterly USDC transfers increasing by about 80% year-over-year, and on-chain payment scenarios showing significant growth.

Cross-Chain Liquidity Migration Path Analysis

Artemis cross-chain bridge data clearly outlines recent capital migration paths. In the past week, Arbitrum recorded about $817 million in inflows and $733 million outflows, with a net inflow of approximately $83.8 million, ranking among the top in net inflows across all chains. Meanwhile, Ethereum absorbed about $8.4 billion in stablecoin capital, further consolidating its role as the primary storage layer, even as a large portion of transaction activity shifts to Layer 2 networks.

Of particular interest is Circle’s Cross-Chain Transfer Protocol (CCTP) technological iteration. On April 14, 2026, Circle announced a major architecture update to CCTP, introducing a “pay first, settle later” model supporting instant USDC payments and deferred cross-chain settlement. This protocol now covers over 14 blockchains including Arbitrum, Base, and Solana, significantly reducing the friction costs of cross-chain liquidity transfers. The infrastructural improvements provide a technical foundation for the rapid movement of stablecoins across multiple chains.

Industry Impact and Strategic Implications: Issuers’ Competition and Layer 2 Reshaping

Competition Among Stablecoin Issuers Tilts

The accelerated penetration of USDC across three chains is reshaping the stablecoin market landscape. Although USDT still maintains a leading total market cap of about $184.1 billion, its market share has declined by roughly 2.5 percentage points to about 57.96%. USDC has become the dominant stablecoin on Solana, Base, and Arbitrum—over 90% on Base, increasing its market share on Arbitrum from 44% to 58%, and becoming the primary native mint on Solana.

USDC’s rise is closely linked to its compliance advantages. It has obtained MiCA licensing in Europe, securing regulatory approval in a regulated financial market; its rapid penetration into on-chain payment scenarios—such as the $1.7 trillion transfer volume on Ethereum last month—further cements its role as the “on-chain dollar” infrastructure.

Layer 2 Stablecoin Competition Enters a New Phase

The competition for stablecoins between Base and Arbitrum Layer 2s has entered a new stage. With a stablecoin supply of $4.81 billion, Base temporarily leads Arbitrum’s $3.75 billion by about $1.06 billion. Base’s advantage lies in native USDC issuance and deep integration with Coinbase’s ecosystem, making it an important portal for institutional capital entering the chain. Official disclosures indicate that Base’s stablecoin trading volume in 2025 reached $17 trillion, covering 26 local currencies across 17 countries, with ongoing ecosystem potential.

Meanwhile, Arbitrum maintains a lead in total value secured (TVS), reaching $16.64 billion, making it the largest general-purpose Ethereum Layer 2 network. Its strength stems from the deep deployment of top DeFi protocols like GMX, Uniswap, and Aave, creating strong network effects and capital retention capabilities.

Establishment of a Multi-Chain Parallel Ecosystem

The deep trend revealed by the synchronized inflows into three chains is a shift from a “monopolar dominance” to a “multi-polar parallel” structural evolution in the crypto market. Ethereum mainnet remains the core storage layer, absorbing about $8.4 billion in stablecoin capital, with USDT around $17k and USDC about $80k, collectively contributing roughly three-quarters of stablecoin liquidity. Meanwhile, Solana, as a high-performance Layer 1, handles high-frequency trading and payment scenarios; Base, as an extension of Coinbase’s ecosystem, focuses on application-layer use cases; Arbitrum, as a DeFi settlement layer, maintains institutional-grade liquidity—each chain’s role in stablecoin usage is becoming increasingly differentiated.

In Q1 2026, Solana recorded its first trillion-dollar quarterly economic activity, with on-chain transaction volume reaching $1.6 trillion, accounting for about 12% of the overall crypto spot market. Monthly active users reached several million, with user holdings hitting a record high of 167 million in early April. These data points indicate that the multi-chain ecosystem’s parallel development has moved from conceptual to reality, with the distribution of stablecoins serving as the most direct quantitative indicator of this trend.

Conclusion

The phenomenon of Solana, Base, and Arbitrum simultaneously absorbing stablecoin liquidity in April 2026 marks a new stage of infrastructure competition in the crypto market—multi-chain parallelism. From the data perspective, Solana’s weekly minting of $3.25 billion USDC, Base’s stablecoin supply of $4.81 billion with a 14-fold velocity, and Arbitrum’s weekly net inflow of $83.8 million all point to a clear trend—stablecoins are no longer concentrated on a single chain but are distributed according to each chain’s functional positioning.

This distribution pattern is a natural outcome of the maturation of crypto infrastructure. Differentiated positioning in performance, cost, compliance, and application scenarios across blockchains provides stablecoins with diverse “habitats.” Meanwhile, the continuous improvement of cross-chain infrastructure like Circle’s CCTP is weaving dispersed on-chain liquidity into a rapidly dispatchable unified network.

For industry participants, understanding this pattern requires going beyond the mere supply figures and focusing on the actual usage of stablecoins across different chains—whether they are being accumulated, circulated, or efficiently allocated into DeFi protocols. The proportions among these states are the true measure of the health of a multi-chain stablecoin ecosystem.