CHAPTER 3

Stablecoins & Asset-Backed Currencies

Understanding the mechanisms, risks, and opportunities of cryptocurrencies designed to maintain stable value through various collateralization and algorithmic approaches.

3.1 The Stablecoin Revolution

Stablecoins represent one of the most important innovations in cryptocurrency, solving a fundamental problem: volatility. While Bitcoin and other cryptocurrencies have proven revolutionary as technologies and stores of value, their price volatility makes them impractical for everyday transactions and business operations.

A merchant cannot price goods in Bitcoin when the currency might fluctuate 10% in a day. Employees don't want salaries paid in assets that could lose 20% of their value before rent is due. Lenders cannot issue loans denominated in cryptocurrencies with unpredictable purchasing power.

Stablecoins solve this by pegging their value to stable assets—typically the US dollar, but also other fiat currencies, commodities, or baskets of assets. This stability enables stablecoins to function as:

3.2 Types of Stablecoins

3.2.1 Fiat-Collateralized Stablecoins

The most straightforward approach: back each stablecoin token 1:1 with fiat currency held in reserve. For every $1 of stablecoin issued, $1 (or equivalent value) is held in a bank account or short-term securities.

How They Work

  1. Issuance: User deposits $100 USD → Issuer mints 100 stablecoin tokens
  2. Redemption: User burns 100 tokens → Issuer returns $100 USD
  3. Reserve Management: Issuer maintains reserves in cash, government bonds, or money market funds
  4. Audits: Regular attestations to verify reserves match outstanding tokens

Major Fiat-Collateralized Stablecoins

Stablecoin Issuer Market Cap Reserves
USDT (Tether) Tether Ltd ~$90B Cash, T-bills, corporate bonds
USDC Circle ~$25B Cash, short-term US Treasuries
BUSD Paxos (for Binance) ~$16B Cash, cash equivalents (NY regulated)
TUSD TrustToken ~$3B USD in segregated accounts

Advantages:

Risks:

⚠️ The Tether Controversy

Tether (USDT), the largest stablecoin, has faced scrutiny over reserve transparency. Initially claiming 100% backing by USD in bank accounts, it later revealed reserves included commercial paper, secured loans, and other assets. In 2021, Tether paid $41M to settle CFTC charges over reserve misrepresentations. This highlighted the critical importance of transparent auditing and regulatory oversight for fiat-collateralized stablecoins.

3.2.2 Crypto-Collateralized Stablecoins

These stablecoins are backed by cryptocurrency collateral rather than fiat. To account for crypto volatility, they typically use over-collateralization—requiring $150-200 worth of cryptocurrency to mint $100 in stablecoins.

DAI: The Flagship Example

DAI, created by MakerDAO, is the most successful crypto-collateralized stablecoin. It maintains a peg to the US dollar through a system of smart contracts, collateralized debt positions (CDPs), and algorithmic incentives.

How DAI Works:

  1. Lock Collateral: User deposits $150 worth of ETH into a Maker Vault
  2. Mint DAI: User can mint up to $100 DAI (maintains 150% collateralization ratio)
  3. Pay Stability Fee: Interest accrues on borrowed DAI
  4. Repay & Unlock: User returns 100 DAI + fees to unlock their ETH
  5. Liquidation: If ETH price drops and collateralization falls below threshold (e.g., below 130%), vault is liquidated to maintain system solvency

Peg Stability Mechanisms:

Advantages:

Risks:

3.2.3 Commodity-Backed Stablecoins

These stablecoins are backed by physical commodities, typically gold. Each token represents ownership of a specific amount of physical commodity held in secure vaults.

Examples

Advantages:

Challenges:

3.2.4 Algorithmic Stablecoins

Algorithmic stablecoins attempt to maintain their peg through algorithms and smart contracts that adjust supply and demand, without traditional collateral backing. They are the most experimental and have seen spectacular failures alongside innovative successes.

Mechanisms

Rebase Mechanisms (Elastic Supply):

The protocol automatically adjusts the supply of tokens in all holders' wallets:

Example: Ampleforth (AMPL)

Seigniorage Shares:

Two-token systems with a stablecoin and a volatile "share" token:

Example: Empty Set Dollar (ESD), Basis Cash

Hybrid Algorithmic:

Combines partial collateral with algorithmic mechanisms.

Example: Frax (fractionally collateralized, algorithmically stabilized)

The Terra/Luna Collapse (2022)

The most spectacular algorithmic stablecoin failure was Terra's UST, which collapsed in May 2022, losing over $60 billion in value and triggering a broader crypto market crash.

⚠️ Case Study: Terra/Luna Death Spiral

Terra's UST was algorithmic, backed by LUNA token. Users could always trade $1 of LUNA for 1 UST and vice versa. When UST lost its peg:

  1. UST dropped below $1, arbitrageurs bought cheap UST to redeem for $1 of LUNA
  2. Protocol minted massive amounts of LUNA to meet redemptions
  3. LUNA supply exploded, price collapsed from $80 to $0.00001
  4. With LUNA worthless, UST had no backing, completing the death spiral
  5. Result: $60B+ in value destroyed, thousands of investors ruined

Lessons:

Current Status:

After Terra's collapse, pure algorithmic stablecoins are viewed with skepticism. Most surviving projects either maintain partial collateral or serve niche experimental purposes rather than mainstream use.

3.3 Reserve Management & Transparency

3.3.1 Reserve Composition Best Practices

The quality and liquidity of reserves are critical to stablecoin safety:

Ideal Reserve Assets:

Assets to Avoid or Minimize:

3.3.2 Attestation and Auditing

Transparency builds trust. Stablecoin issuers should provide:

WIA-FIN-004 Reserve Standards

Stablecoins complying with WIA-FIN-004 must:

3.4 Regulatory Landscape

3.4.1 United States

Stablecoins face fragmented regulation across multiple agencies:

Legislative Proposals:

3.4.2 European Union - MiCA Regulation

The Markets in Crypto-Assets (MiCA) regulation creates comprehensive framework:

3.4.3 Asia-Pacific Approaches

Varied approaches across the region:

3.5 WIA-FIN-004 Stablecoin Technical Specification

3.5.1 Stablecoin Metadata Standard

{
  "stablecoin": {
    "name": "string",
    "symbol": "string",
    "type": "FIAT_BACKED | CRYPTO_BACKED | COMMODITY | ALGORITHMIC | HYBRID",
    "peg": {
      "asset": "USD | EUR | GOLD | BASKET",
      "ratio": "1:1 | custom",
      "mechanism": "FULL_RESERVE | OVER_COLLATERALIZED | ALGORITHMIC"
    },
    "issuer": {
      "entity": "string",
      "jurisdiction": "ISO_3166",
      "license": "string",
      "regulators": ["array"]
    },
    "reserves": {
      "type": "SEGREGATED | POOLED",
      "composition": {
        "cash": "percentage",
        "government_securities": "percentage",
        "other": "percentage"
      },
      "custodian": "string",
      "lastAttestation": "ISO_8601",
      "auditFrequency": "MONTHLY | QUARTERLY | ANNUAL"
    },
    "redemption": {
      "available": boolean,
      "minimumAmount": "decimal",
      "fee": "percentage",
      "processingTime": "string"
    },
    "compliance": {
      "kycRequired": boolean,
      "amlProgram": boolean,
      "jurisdictions": ["array"]
    }
  }
}

3.5.2 Reserve Proof API

Stablecoins should implement programmatic reserve verification: 

GET /api/v1/reserves

Response:
{
  "timestamp": "2024-01-15T12:00:00Z",
  "totalSupply": "1000000000.00",
  "totalReserves": "1000500000.00",
  "collateralizationRatio": "100.05%",
  "breakdown": {
    "cash": "300000000.00",
    "treasuries": "700000000.00",
    "other": "500000.00"
  },
  "proof": {
    "merkleRoot": "hash",
    "attestation": "signed_document_url"
  }
}

3.6 Future of Stablecoins

Stablecoins are evolving rapidly with several key trends:

"Stablecoins represent a bridge between traditional finance and the decentralized future—preserving stability while embracing innovation." - WIA Stablecoin Working Group