Stablecoins hit a bank-sized bottleneck

Genuine stablecoin payments ran at roughly $390 billion annualized in late 2025. That sounds big until it sits next to the $208 trillion cross-border payments market it's supposed to disrupt.

The middle leg

Enterprise money moves in fiat on both ends. A corporate treasury sends dollars, a supplier receives dollars, and stablecoins only ever touch the leg in between, the part that used to run through correspondent banking.

That middle leg is where the settlement speed argument lives. It's also where the on-ramp and off-ramp bottleneck sits, because someone regulated has to touch the fiat at both ends.

The numbers

The gap between stablecoin volume and the market it targets is the whole story, and so is who sits on either side of every conversion.

• Genuine stablecoin payment volume hit roughly $390 billion annualized in late 2025, per Decrypt.
• That figure equals about 0.02% of the $208 trillion global cross-border payments market cited in the same reporting.
• Enterprise stablecoin flows begin and end in fiat, meaning every transaction needs a regulated bank rail at both edges.
• Single-bank dependency is flagged as the sector's most underrated operating risk, per Decrypt's reporting.

Where the ceiling actually sits

The default read on stablecoins treats adoption as a technology problem: better rails, faster settlement, cheaper fees than SWIFT. The 0.02% figure says the technology already works and isn't the constraint.

The constraint is who's willing to hold the fiat on either side of the conversion. Every enterprise flow needs a bank, or a bank-like entity, to accept dollars in and pay dollars out. That's a licensing and counterparty-risk problem, not a blockchain-throughput problem.

Single-bank dependency makes this worse than it looks. If one banking partner handles issuance, redemption, or custody for a stablecoin program, that program inherits every restriction, outage, and compliance decision that bank makes. A scaling stablecoin business is a scaling bank-relationship business, and bank relationships don't scale the way software does.

This explains why the volume plateaus around a fraction of a percent of the addressable market even as issuance and market cap headlines keep climbing. Market cap measures tokens outstanding. It doesn't measure how many regulated fiat gateways exist to move money through those tokens at enterprise volume.

The number of banks willing to underwrite stablecoin fiat rails, at scale, with redundancy, is small. Until that number grows, $390 billion is close to a ceiling, not a floor.

What would move the ceiling

The fix isn't more chains or faster settlement engines. It's more banks willing to sit on both sides of the fiat leg, and willing to do it as one option among several rather than as the single point of failure.

That's a regulatory and commercial problem before it's a technical one. It requires banks to price stablecoin fiat rails as a business line, not a pilot, and regulators to give them a clear enough framework to do it without treating every stablecoin issuer as a one-off risk case.

Watch for whether the next 12 months bring more banks into stablecoin fiat rails or just more issuers competing for the same handful of banking partners.

• Number of distinct regulated banks offering stablecoin issuance or redemption rails to enterprise clients, tracked quarter over quarter.
• Whether any major stablecoin program discloses a second or third banking partner, reducing single-bank dependency.
• Growth in the $390 billion annualized figure itself in the next reporting cycle, and whether it moves faster than global cross-border volume.