Stablecoins Cross the Rubicon: From Crypto Sideshow to Financial Infrastructure

The stablecoin market has hit an inflection point. In the space of a single week in early March, several developments confirmed what payment operators have known for a long time. Stablecoins have left the crypto world and represent a true structural shift in how money moves.

The New York Times reported that stablecoin issuers now hold more U.S. Treasury debt than major government creditors including Saudi Arabia or South Korea, with the market reaching $300 billion andU.S. Treasury Secretary Scott Bessent projecting $3 trillion within five years. Block - Jack Dorsey’s firm and one of crypto’s most ideologically committed Bitcoin-only companies - announced it would add stablecoin support to Cash App, with Dorsey conceding that “our customers want to use them.”

Total stablecoin market capitalisation hit a record $313 billion as of March 2026, up from roughly $20 billion in 2020. Annual transfer volume reached $33 trillion in 2025, up 72% year-on-year. AsFidelity launches a stablecoin along withWestern Union, the signal is unmistakable. Legacy financial institutions are concluding that stablecoin rails are now ready to serve as production-grade infrastructure. BlackRock has positioned stablecoins as a core theme in its 2026 outlook, describing them as “digital dollar rails” that reshape how money settles globally.

Payments networks are moving fast. Visa has launched stablecoin settlement in the United States and is working to introduce stablecoin-linked cards across more than 100 countries. Mastercard has partnered with SoFi to enable stablecoin settlement and is building a “three-layer payments stack” - consumer spend, merchant settlement, and wallet payouts - all stablecoin-enabled.

But the real test of stablecoin infrastructure is not whether it can replicate what already works in New York or London. It is whether it can reach the corridors where legacy rails have consistently failed.

**Where the demand actually lives

**

The strongest pull is coming from emerging markets, where stablecoins solve problems that legacy infrastructure simply cannot.Goldman Sachs estimates that roughly 66% of the global stablecoin supply

• some $200 billion - is held by individuals in emerging markets, using digital dollars to hedge against currency instability, inflation, and capital controls.

The cost advantages are stark. A traditional remittance from Lagos to Nairobi takes three to five business days and costs 6–8% of the transfer amount. A stablecoin transfer on the same corridor completes in roughly 60 seconds at 1.5–2.5% all-in. Across Africa, stablecoins account for 43% of crypto transactions in Sub-Saharan Africa, with Nigeria alone accounting for 40% of inflows. Early movers in 2025 saw 200–300% year-on-year growth in cross-border transaction volume after launching stablecoin corridors

Payment service providers operating in African and MENA corridors are building on stablecoin rails because they eliminate the prefunding costs, correspondent banking friction, and multi-day settlement windows that make traditional cross-border payments expensive and slow. The operational reality has outpaced the policy conversation.

The regulatory reckoning

The policy conversation is catching up, albeit unevenly. TheGENIUS Act, signed into law in July 2025, was the first comprehensive federal framework for stablecoins in the United States, mandating 1:1 reserve backing, AML compliance, and restricting collateral to Treasury bills with a remaining maturity of 93 days or less. TheOCC granted national trust bank charters to Circle, Paxos, Ripple, BitGo, Fidelity Digital Assets - five nonbank firms in total - in December 2025. Those were necessary steps. But the fight that matters now is the CLARITY Act - and it reveals exactly where the tension sits.

TheCLARITY Act, which passed the House in July 2025 with broad bipartisan support, has stalled in the Senate over a single provision: whether stablecoin platforms can offer yield on dollar-denominated tokens. The White House brokered a compromise - allow yield on stablecoins used for peer-to-peer payments, prohibit it on idle balances. Crypto firms accepted. On March 5, theAmerican Bankers Association rejected it outright. JPMorgan and

Bank of America have cited aTreasury study estimating banks could lose up to $6.6 trillion in deposits if stablecoins offered a return. The banks are not arguing that stablecoins are unsafe. They are arguing that stablecoins are too competitive.

The irony is that by blocking the CLARITY Act, banks may be hurting themselves more than they are hurting crypto. Without a clear federal framework for digital asset market structure, banks’ own general counsels are blocking major blockchain initiatives to avoid operational and legal risk. As multiple industry observers have noted, the CLARITY Act “will benefit banks more than crypto.” The regulatory vacuum does not protect incumbent deposits. It prevents incumbents from building the digital rails they will eventually need to compete.

Another concern - raised by BlackRock and others - is that dollar-backed stablecoin adoption could displace local currencies in emerging markets. But this misreads the dynamic on the ground. In markets with 20%+ inflation or severe currency controls, people are already dollarising through informal channels. Stablecoins formalise that demand, making it visible, auditable, and - with the right regulatory partnerships - taxable. The alternative is not a strong local currency. It is an untracked shadow dollar economy.

What comes next

The question of whether stablecoins become mainstream financial infrastructure is settled. The next defining challenge is interoperability: building the bridges between stablecoin rails and existing payment systems so they work together rather than in parallel. The World Economic Forum flagged this in January, and the operators building in this space know it firsthand. The companies that will define the next decade of global payments are not the ones issuing stablecoins. They are the ones building the infrastructure layer that connects stablecoin liquidity to real-world payment corridors - companies likeMansa, which is turning digital dollars into local currency at the last mile, in real time, at a fraction of the legacy cost.