Stablecoins are the plumbing of crypto trading. If you trade digital assets, you'll use them constantly — so it's worth understanding what they are and where the risks hide.
What a stablecoin is
A stablecoin is a crypto token designed to hold a steady value, usually pegged 1:1 to a currency like the US dollar. The best-known are USDT (Tether) and USDC. They let you move in and out of volatile assets without cashing back to a bank.
Why traders use them
- A safe harbour — park funds in a stablecoin to step out of Bitcoin or altcoin volatility without leaving crypto.
- The base pair — most crypto pairs are quoted against USDT or USDC (e.g. BTC/USDT), so it's the unit you price trades in.
- Speed — moving value between exchanges quickly.
How they're backed (and the risk)
- Fiat-backed — reserves of cash and short-term assets (USDT, USDC). The key risk is whether the reserves are real and sufficient.
- Crypto-backed / algorithmic — collateralised by other crypto or managed by code. Algorithmic stablecoins have failed spectacularly before, losing their peg and wiping out holders.
The honest caveat
"Stable" is a design goal, not a guarantee. Stablecoins can de-peg — briefly or permanently — during stress. They also carry counterparty and regulatory risk. Treat the biggest, most transparent ones as the default, and never assume a stablecoin is the same as cash in a bank.
A stablecoin is a tool for moving through crypto, not a risk-free vault. Know what's backing the one you hold.
Education only — not financial advice.