Shifting stablecoin flows across Layer-1s are something that investors pay close attention to.
The logic is simple: more liquidity means more room for capital rotation. More importantly for DeFi, it strengthens a chain’s role as a settlement layer, entrenching its position as a core infrastructure for decentralized power.
According to data from DeFiLlama, something similar is now unfolding. The USDT supply is almost evenly split between Ethereum (44.34%) and Tron (45.57%), leaving a very small gap between the two.
In that context, Tether is minting $1 billion USDT on Ethereum [ETH] meaningfully tilts liquidity weight back to ETH rails.
The result?
USDT monthly supply growth on TRON [TRX] is up 0.44% versus Ethereum’s 3.19%, further narrowing the gap. But beyond this divergence, the real signal is the activity in the chain.
AMBCrypto recently noted that Ethereum saw a transaction volume of over 200 million in the first quarter, marking its busiest quarter yet.
But if we zoom out on the stablecoin flows, this is not a one-time move. USDC usage on Ethereum reached an all-time high in March, with monthly volume exceeding $1.8 trillion, while Tether’s USAT saw a 714% market cap increase in one month.
In short, the strong stablecoin inflows have directly contributed to Ethereum’s on-chain activity.
Of course, that brings us to the $1 billion recently spent by Tether.
Is this an early signal of a similar network shift for Ethereum usage in the second quarter, further cementing its role in the DeFi ecosystem? Looking at broader factors, the impact appears to go far beyond DeFi.
The influx of stable coins strengthens Ethereum’s relative market structure
The March rally may set a clear precedent for where Ethereum could go.
At a macro level, volatility associated with the Iran-US conflict continues to keep investors cautious, further exacerbating the broader risk outbreak seen earlier this quarter.
And yet, ETH still ended March with strong stablecoin inflows, with nearly 35% of the network’s 200 million transaction volume taking place in that month alone.
But the impact goes further than just the statistics in the chain. As the chart below shows, March was the only bullish month for Ethereum in the first quarter, with ETH delivering a monthly ROI of 6.97%.
The key takeaway: that performance was almost 3.8x higher than Bitcoin [BTC]after two straight months of ETH underperforming BTC.
In essence, stablecoin flows have not only boosted DeFi activity.
Instead, they translated into technical power. The ETH/BTC ratio closed March up 5.15%, marking the strongest monthly move since August 2025. According to AMBCrypto, that’s where Tether’s $1 billion USDT coin on Ethereum starts to matter beyond just liquidity growth.
If the trend continues, it could post similar outperformance in April instead strong inflow of stablecoins it continues to directly contribute to Ethereum’s on-chain activity and relative strength against Bitcoin.
Final summary
- Stablecoin’s liquidity returns to Ethereum, strengthening its role as a primary settlement layer and boosting on-chain activity.
- March showed liquidity translating into performance, with strong stablecoin inflows matching ETH’s outperformance against Bitcoin, a situation that could continue into April.