Stablecoin

A stablecoin is a cryptocurrency designed to maintain a fixed value relative to a reference asset, most commonly the US dollar. Unlike Bitcoin or Ethereum, whose prices fluctuate by double digits in a single day, stablecoins hold a consistent value -- $1 USDC is always worth $1.

How Stablecoins Work

Most stablecoins maintain their peg through reserves. For every token in circulation, the issuer holds an equivalent amount of real-world assets -- US dollars, Treasury bills, or other cash equivalents -- in custody. When someone buys 1,000 USDC, Circle (the issuer) receives $1,000 and holds it in reserve. When they redeem it, the USDC is burned and the dollars are returned.

This reserve backing creates a two-way guarantee: the token can always be redeemed at face value, and the total supply never exceeds the collateral held. Independent auditors verify these reserves on a regular basis, providing a layer of accountability that pure cryptocurrencies lack.

Types of Stablecoins

Fiat-backed stablecoins are the most widely used. Each token is backed 1:1 by fiat currency or equivalent assets held in regulated financial institutions. USDC and USDT fall into this category, together accounting for the majority of the $200B+ stablecoin market in 2026.

Crypto-backed stablecoins use other cryptocurrencies as collateral, typically over-collateralized to absorb price swings. DAI, issued by MakerDAO, is the leading example. A user might lock $150 worth of ETH to mint $100 in DAI.

Algorithmic stablecoins attempt to maintain their peg through software-controlled supply adjustments rather than reserves. This model has proven fragile -- the collapse of TerraUSD (UST) in 2022 erased tens of billions in value and triggered widespread regulatory scrutiny. Algorithmic designs remain high-risk and are not used in production payment systems.

For payments and business use, fiat-backed stablecoins are the practical standard.

Key Stablecoins

USDC is issued by Circle, a regulated US financial company. It runs on over a dozen blockchains including Ethereum, Solana, Base, and Polygon. Circle publishes monthly reserve attestations audited by Deloitte. USDC is the preferred stablecoin for institutional and business use. Learn more in What is USDC or the USDC glossary entry.

USDT (Tether) is the oldest and largest stablecoin by market cap, issued by Tether Limited. It has faced questions about reserve transparency historically but remains the dominant stablecoin by trading volume, particularly in Asian and emerging markets.

EURC is Circle's euro-denominated stablecoin, useful for businesses operating in the Eurozone who want euro-denominated settlements without traditional wire delays.

Why Stablecoins Matter for Payments

Traditional cross-border payments are slow and expensive. A bank wire from the US to Nigeria takes 3-5 business days and loses 3-7% to fees and exchange rate markups. Stablecoins move in minutes, 24/7, on any day including weekends and holidays, for a fraction of a cent per transaction.

For businesses paying international contractors, suppliers, or employees, this means:

• Settlements in minutes instead of days
• Predictable costs without correspondent banking fees
• No exposure to cryptocurrency volatility (the value stays at $1)
• Programmable transfers with on-chain verification

Annual stablecoin transfer volume has reached tens of trillions of dollars, surpassing major payment networks for certain corridors. The technology is no longer experimental -- it is the infrastructure layer for modern global payments.

Stablecoins at Copperx

Copperx is built entirely around stablecoins. The platform lets businesses send USDC and USDT to 50+ countries, pay contractors, and manage treasury -- without touching traditional banking rails for the cross-border leg of a transfer.

Funds arrive in local currency via off-ramp partners who convert stablecoins to local fiat at the destination. Businesses can also issue stablecoin corporate cards that let employees spend from a USDC balance anywhere Visa is accepted.

Frequently Asked Questions

What is a stablecoin in simple terms?

A stablecoin is a digital dollar (or euro, or other currency) that lives on a blockchain. It has the speed and programmability of crypto but holds a fixed value like regular money.

Are stablecoins safe?

Fiat-backed stablecoins like USDC are considered low-risk because each token is backed by real dollars held in regulated custody. The main risks are issuer counterparty risk and smart contract bugs. Algorithmic stablecoins carry significantly higher risk.

What is the difference between USDC and USDT?

Both are US dollar stablecoins, but USDC is issued by Circle (a US-regulated company) with monthly audited reserve attestations, while USDT is issued by Tether Limited with less regulatory oversight. USDC is generally preferred for institutional and business use.

Can I use stablecoins for business payments?

Yes. Stablecoins are increasingly used for payroll, supplier payments, and cross-border transfers. Platforms like Copperx are purpose-built for exactly this use case.

How do stablecoins maintain their $1 peg?

Fiat-backed stablecoins maintain their peg by holding $1 in reserves for every $1 token in circulation. Arbitrageurs also help: if USDC trades below $1, traders buy it cheaply and redeem it at face value for profit, pushing the price back up.

What blockchains support stablecoins?

USDC is available on Ethereum, Solana, Base, Polygon, Arbitrum, Avalanche, and others. USDT supports a similar set. Copperx supports transfers across multiple chains, letting you choose based on speed and cost.