GUIDES Bithues Editorial

Stablecoins Explained: What 'Backed' Really Means

Why Stablecoins Exist

Cryptocurrency is volatile. Bitcoin can move 10% in a day. Most ordinary financial uses — payments, savings, remittances — require a stable unit of account. Stablecoins attempt to solve this: a digital asset designed to hold a steady value, typically $1.00.

The idea is simple. The execution is complicated.

The Three Types of Stablecoins

1. Fiat-Collateralized

Every token is backed 1:1 by actual dollars sitting in a bank account. For every 1,000 USDT in circulation, there's $1,000 in Tether's bank account (in theory).

Examples: Tether (USDT), USD Coin (USDC), PayPal USD (PYUSD)

Strengths: Simple concept. Direct redeemability.

Risks: Counterparty risk. You have to trust that the issuer actually holds the reserves and hasn't lent them out or invested them. Reserve attestations are audits, not audits — Tether has faced years of questions about whether its reserves were actually fully backed.

2. Crypto-Collateralized

Backed by other cryptocurrencies, over-collateralized to absorb price swings. For example, MakerDAO's DAI might be backed by $1.50 of ETH for every $1 of DAI, so even if ETH drops 40%, there's still enough collateral.

Examples: DAI, sUSD

Strengths: Decentralized — no single company controls the reserves.

Risks: Smart contract risk. Liquidation risk if collateral prices fall fast. Over-collateralization means you need more crypto to generate the same stablecoin value.

3. Algorithmic (Non-Collateralized)

No explicit backing. Value is maintained through algorithmic expansion and contraction of supply — burning tokens when demand rises, issuing new tokens when demand falls. Theoretically stable through economic mechanics rather than reserves.

Examples: FRAX (partially algorithmic), and several failed coins including TerraUST

Risks: The most dangerous category. TerraUST (UST) was the third-largest stablecoin by market cap before it collapsed to near-zero in May 2022, wiping out $60 billion in value. Algorithmic stablecoins have no reserve asset to fall back on when the mechanism fails. Avoid algorithmic stablecoins for any serious use.

What "Backed" Actually Means

The word "backed" does a lot of work in stablecoin marketing. Here's what it actually implies:

USDT (Tether)

Tether claims to be backed by "cash and cash equivalents." Its reserves have historically included corporate bonds, secured loans to affiliated entities, and other assets that are not actually cash. The ratio of cash to total reserves has varied significantly. Tether has paid fines for lying about reserves and has been banned from doing business in New York.

USDC (Circle)

Circle publishes monthly attestations from independent accounting firms. Reserves are held in US Treasuries and cash at regulated US banks. This is a more transparent structure than Tether, but attestations are not full audits, and Circle has at times held reserves at Silicon Valley Bank — which failed in March 2023 (though SVB was resolved and customer deposits were protected).

PYUSD (PayPal USD)

Launched by PayPal in 2023, PYUSD is fully backed by US dollar deposits, Treasuries, and equivalent cash assets. It's issued by PayPal, a regulated company, and is redeemable 1:1 for dollars. Relatively new with a shorter track record.

What Can Go Wrong

Issuer Bankruptcy

If the stablecoin issuer goes bankrupt, your claim as a token holder is likely subordinate to other creditors. USDC's Circle has stated it would treat token holders as general creditors — not as direct owners of the reserve assets. In a bankruptcy, you might get cents on the dollar, or nothing.

Bank Failure

If the reserve dollars sit in a bank that fails, you're dependent on that bank's resolution process. In the US, FDIC insurance covers $250,000 per depositor — but stablecoin issuers holding corporate accounts may have far larger balances that exceed this.

Regulatory Action

A stablecoin issuer could be ordered to freeze redemptions by a regulator. This is not theoretical — it's happened in various jurisdictions.

Bank Run Dynamics

If enough people doubt the backing simultaneously, a stablecoin can enter a death spiral: redemption requests spike → issuer can't process them all → doubt increases → more redemptions. This is what happened to UST and several smaller stablecoins.

How to Choose a Stablecoin

| Feature | USDC | USDT | PYUSD | |---------|------|------|-------| | Reserve transparency | Monthly attestation | Opacity historically | Monthly attestation | | Regulatory status | Regulated (US) | Limited US regulatory clarity | Regulated (US) | | Track record | 6+ years | 10+ years (controversial) | New (<3 years) | | Redemption | Circle承诺 1:1 | Tether承诺 1:1 | PayPal承诺 1:1 | | Audit standard | Third-party | Self-reported | Third-party |

Practical Recommendations

  1. Use USDC or PYUSD over USDT for any serious holding — the transparency difference is meaningful.
  2. Don't hold large stablecoin balances long-term in any single issuer. The risk of a catastrophic depeg event, while low, is not zero.
  3. If you need stablecoins for DeFi, be aware that using them in smart contracts introduces additional smart contract risk on top of stablecoin issuer risk.
  4. For payments and remittances, consider whether a traditional bank wire or a regulated neobank might serve you better than any stablecoin.

The Disclaimer

No stablecoin is truly "as safe as the dollar." The dollar in your bank account has FDIC insurance up to $250,000. A stablecoin in your wallet does not. The difference matters as balances grow.

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