USDT Explained: Networks, Uses & Risks

What is USDT? It is a stablecoin: a crypto token designed to keep a steady value, in this case one US dollar per token. It is issued by a company called Tether, which is why many people simply call it "Tether". On crypto exchanges it plays the role that cash plays in a brokerage account: a place to park value between trades without leaving the crypto system.

How the dollar peg is meant to work

Tether creates new USDT when approved customers send it dollars or equivalent assets, and removes USDT from circulation when those customers redeem tokens for dollars. In principle, every token in circulation is matched by reserves held by the company, and Tether publishes regular reports on what those reserves contain.

The peg is held in the market by a simple incentive. If USDT trades below one dollar on exchanges, large holders who can redeem with Tether can buy it cheaply and exchange it for a full dollar. If it trades above, they can create new tokens and sell them. Most everyday users cannot redeem directly with Tether and rely on exchanges to buy and sell.

Illustrative example: if USDT briefly trades at $0.998, then 1,000 USDT is worth $998 at that moment. Small deviations like this are normal. Larger breaks can happen if people doubt the reserves, and a stablecoin is only as solid as what stands behind it.

What is USDT used for?

• A trading currency. Many crypto pairs are quoted against USDT, such as BTC/USDT, so traders hold it between positions.
• Moving value between platforms. Sending USDT on a fast, cheap network can be quicker than a bank transfer between exchanges.
• Dollar exposure. In some countries people use it as an informal way to hold something dollar-like, though it carries risks a bank deposit does not.
• Payments. Some merchants and freelancers accept it, though consumer protections are minimal.

Why quote currency matters

When a crypto price is shown as BTC/USDT, the result of any trade is counted in USDT, not in dollars. For most purposes the difference is tiny, but it is not zero. If USDT itself slipped below its peg, a trader who had "made" 1,000 USDT would hold a little less than $1,000 in real terms. That is one reason professional traders pay attention to the stablecoins they hold, and why beginners should not assume that a balance shown in USDT is the same thing as cash in the bank.

Networks: the part beginners get wrong

USDT is not a single blockchain. The same token is issued on several networks, and each version lives only on its own chain. Two of the most common are:

When you withdraw USDT, the sending platform asks you to choose a network. The receiving platform shows a deposit address for a specific network. These must match. Sending ERC20 USDT to an address that expects TRC20 may mean the funds never arrive, and recovery, if possible at all, depends entirely on the receiving platform's goodwill.

A careful transfer, step by step

1. On the receiving side, choose the network first, then copy the deposit address it gives you.
2. On the sending side, select exactly the same network.
3. Paste the address and compare the first and last several characters with the original. Some malware swaps copied addresses.
4. Send a small test amount and wait for it to arrive before sending the rest.
5. Keep the transaction ID (hash) until the transfer is confirmed.

Illustrative fees: if a platform charged a flat 1 USDT to withdraw on one network and 5 USDT on another, moving 250 USDT would cost 0.4% or 2% respectively. Real fees vary by platform and by how busy each network is, so check the figure shown on the withdrawal screen.

What is USDT not?

• Not a bank deposit. There is no government deposit guarantee behind it.
• Not risk-free. Its value depends on the issuer's reserves, its ability to meet redemptions and continued access to banking.
• Not an investment that grows. Holding USDT earns nothing by itself. Platforms that offer high interest on USDT are taking risks with your tokens to pay it, and some such schemes have failed.
• Not anonymous. Transfers are recorded publicly, and Tether has frozen tokens at addresses linked to crime.

USDT compared with other ways to hold dollars

Other dollar stablecoins exist, run by different issuers with different reserve arrangements. The same questions apply to each: who issues it, what backs it, who can redeem it and on which networks it lives.

Risks to weigh

• Reserve risk: if the assets behind the tokens lose value or cannot be sold quickly, the peg can break.
• Issuer and regulatory risk: rules for stablecoins are changing in many countries, which can affect which platforms list USDT and how.
• Platform risk: USDT held on an exchange depends on that exchange staying solvent.
• Operational risk: wrong networks, poisoned addresses and phishing sites.
• Scam risk: USDT is a favourite payment method in investment and romance scams because it moves fast and cannot be clawed back. See how to spot trading scams.

USDT and the rest of the course

Understanding USDT makes other lessons easier. It is the "quote currency" in many crypto pairs, just as the dollar is in EUR/USD in our forex lesson. It also explains why crypto profit is often measured in dollars even though no dollars change hands. Read how crypto works for the wider picture and the Bitcoin lesson for the asset most often traded against it.

Sources

• Tether, published reserve reports and transparency information