What Is a Stablecoin

What It Actually Means in Practice

The simplest way to understand a stablecoin is to separate what it is from what it runs on.

What it is: a digital representation of a fiat currency. One USDC is a claim on one US dollar held in reserve by the issuer. Holding USDC does not take a position on the crypto market; it is holding dollars in a form that can move across blockchain infrastructure.

What it runs on: a blockchain network,  Ethereum, Solana, Tron, and others, that processes and records transactions without a central institution clearing them. The stablecoin moves the same way any blockchain asset does: from one wallet address to another, with settlement confirmed on the ledger in seconds.

Put those two things together, and you get something the traditional financial system has never had: a dollar-denominated instrument that settles with the speed and finality of a blockchain transaction, without depending on correspondent banks, clearing cycles, or cut-off windows.

How Stablecoins Maintain Their Peg

Not all stablecoins hold their value the same way, and the mechanism matters for anyone using them in a treasury or payment context.

• Fiat-backed stablecoins are the most relevant for enterprise use. The issuer holds fiat currency or short-duration Treasury bills in segregated reserve accounts, with each unit backed 1:1. USDC, issued by Circle, publishes monthly independent auditor attestations on its reserves. USDT, issued by Tether, operates the same model at a higher global volume, though with a reserve history that has drawn more regulatory scrutiny.
• Algorithmic stablecoins attempt to maintain their peg through software-controlled supply mechanics rather than fiat reserves. The collapse of TerraUSD in 2022, which lost its dollar peg and wiped out tens of billions in value within days, demonstrated the structural fragility of this model under market stress. Algorithmic stablecoins are not used in enterprise payment infrastructure for this reason.
• Commodity-backed stablecoins are pegged to physical assets like gold. They exist, but they are not relevant to the cross-border payment use case — the point of a dollar-pegged stablecoin is that the recipient can convert it directly to local fiat without taking commodity price exposure.

For enterprise treasury teams, the relevant stablecoins are fiat-backed, fully reserved, and issued by regulated entities. USDC and USDT, between them, account for the overwhelming majority of institutional stablecoin payment volume.

What Stablecoins Do in a Cross-Border Payment Flow

The payment model is worth laying out precisely because it is often misunderstood. A company using stablecoins for cross-border B2B payments is not holding crypto on its balance sheet or speculating on digital assets. It is using a stablecoin as a settlement rail, the layer that moves value across a border faster and cheaper than correspondent banking.

Here is what that looks like in a real transaction:

A UK company needs to pay a manufacturer in Vietnam $120,000. Under a stablecoin payment model, the UK company converts GBP to USDC at the point of sending. That USDC moves across the blockchain to the recipient, settlement confirmed on-chain in seconds, with an immutable transaction record visible to both parties. At the destination, the USDC is converted to Vietnamese dong through a local off-ramp and credited to the manufacturer's bank account.

The stablecoin was in the picture for a matter of minutes. The UK company sent GBP. The Vietnamese manufacturer received VND. The blockchain handled the cross-border leg,  the part that used to take three to five business days through a correspondent banking chain, in seconds, at a fraction of the cost.

The treasury team didn't touch a private key, hold a stablecoin balance, or take any exposure to the crypto market. They used a more efficient payment rail, and the stablecoin was the instrument that the rail operates on.

Why Stablecoins Are Replacing SWIFT for Enterprise Transfers

The correspondent banking model, SWIFT messages routed through chains of intermediary institutions, each adding fees and time, was built for a world where blockchain infrastructure didn't exist. It works, in the sense that payments eventually arrive. But it is expensive, slow, and operationally difficult to manage at scale.

Stablecoin payments solve those problems structurally rather than incrementally:

• Settlement in seconds, not days: regardless of time zone, bank holidays, or correspondent bank processing queues
• No intermediary fees: value moves directly between sender and recipient with no mid-chain deductions
• Predictable FX: conversion happens at defined rates at the edges of the transaction, not at an undisclosed rate applied by an intermediary mid-chain
• Continuous availability: a payment initiated at 11 pm on a Sunday settles the same way a payment initiated on a Tuesday morning does
• Immutable transaction record: a single on-chain record that both parties can independently verify, which simplifies reconciliation considerably

For a treasury team managing high volumes of international vendor payments, these are not marginal improvements. They change the working capital picture, reduce the operational overhead of cross-border payment management, and produce cleaner data for reconciliation and reporting.

How Merge Uses Stablecoins

Merge uses USDC and USDT as the settlement layer for cross-border B2B payments, with the stablecoin leg managed entirely within Merge's regulated custody infrastructure, invisible to the treasury team's day-to-day workflow. Merge handles the full payment flow from fiat on-ramp through on-chain settlement to local fiat off-ramp.