What is a stablecoin? USDT and USDC, explained
Updated 2026-07-17
A stablecoin is a digital currency designed to hold a steady value, usually pegged one-to-one to a currency like the US dollar. USDT and USDC are the two most widely used. This guide explains what that means in practice.
Pegged, not volatile — with a worked example
Unlike bitcoin or ether, whose prices move constantly, a dollar-pegged stablecoin aims to stay worth one dollar. That makes it usable as money — for holding value, sending, and settling a price — rather than as a speculative asset.
Put concretely: hold 1,000 USDT and a year later you still have about 1,000 dollars of value. Hold the same amount in a volatile asset and a year later it might be worth 600 or 1,800 — good if you are trading, useless if you just wanted your money to stay your money.
ZyndPay supports stablecoins only. It is not an exchange for volatile assets: the point is a steady dollar-denominated balance, not trading.
How the peg actually holds
A stablecoin is only as stable as what stands behind it. The two ZyndPay works with are reserve-backed: the issuer (Tether for USDT, Circle for USDC) holds reserves — cash and short-term instruments — and issues one token per dollar held, redeemable one-for-one. The peg holds because the token is a claim on a real dollar, not a promise made by an algorithm.
That is a genuine distinction worth knowing: some stablecoins tried to hold their peg purely through code and trading incentives, with no reserves, and several collapsed. Reserve-backed is the model that has held. It is still a digital asset, not a bank deposit — understanding who backs it, and your own local compliance, is part of using it well.
USDT and USDC
USDT (Tether) and USDC (USD Coin) are the two stablecoins ZyndPay works with. Both target a one-dollar value; they are issued by different companies and run on different networks.
On ZyndPay, USDT settles on TRON, BNB Smart Chain and Ethereum, and USDC settles on Polygon, Base and Ethereum. In your wallet, a stablecoin is one balance whichever supported network it arrived on.
Why hold a stable-dollar balance
For anyone whose local currency loses value, a dollar-stable balance is a way to hold value without a foreign bank account. For a business, it is a settlement currency that does not swing between the sale and the payout.
Because the value is steady, a stablecoin balance behaves like money you can spend, convert or send — not a bet on a price.
FAQ
- Is a stablecoin the same as bitcoin?
- No. Bitcoin’s price is volatile. A dollar-pegged stablecoin like USDT or USDC is designed to stay worth about one dollar, so it works as money rather than as a speculative asset.
- What is the difference between USDT and USDC?
- Both are dollar-pegged stablecoins issued by different companies and running on different networks. ZyndPay supports both; you can hold each and convert between them.
- Does ZyndPay support other cryptocurrencies?
- No. ZyndPay supports stablecoins only (USDT and USDC). It is not an exchange for volatile assets.