Stablecoins and spending with the Card
A 'stable' coin is only as stable as the mechanism behind it. Crypto's most pragmatic and most philosophically awkward invention at once.
A stablecoin is a crypto token designed to hold a steady value — almost always pegged 1:1 to a fiat currency like the dollar. It bridges crypto's volatility and the stability people need to transact, save, and price things, and it's become one of the most-used products in the space. How the peg is maintained is the whole risk story.
Three ways to hold a peg
- Fiat-collateralized: a company holds real dollars and dollar-equivalents (like short-term government debt) and issues one token per dollar held. This is the dominant model (USDC, USDT), and the peg rests on trust that the reserves exist, are fully backed, and are redeemable — verified, if you're lucky, by periodic attestations.
- Crypto-collateralized: backed by other crypto locked in a smart contract, deliberately overcollateralized (e.g. $150 backing $100) to absorb swings. DAI is the leading example — more transparent and decentralized, but capital-inefficient.
- Algorithmic: tries to hold the peg through automated supply-and-demand rather than hard collateral. This category produced the single worst failure in stablecoin history: in May 2022, TerraUSD (UST), then the third-largest stablecoin, lost its peg and collapsed alongside its sister token LUNA, erasing roughly $45B in days.
The key risk across all of them is a de-peg: when a stablecoin trades meaningfully away from its intended value, usually because the market doubts the backing. A "stable" coin is only as stable as the mechanism behind it — and the only way to know is to understand which mechanism you hold.
The crypto Card
The crypto card is the consumer edge of this. These cards (issued on conventional payment networks) let you spend crypto at ordinary merchants: at checkout, your crypto or stablecoin is converted to local fiat in real time and the merchant receives normal money. It feels like a debit card; underneath, it's selling a slice of your crypto each time you tap.
Convenient — a real glimpse of crypto as everyday money — but spending a volatile or appreciating asset, and the conversions involved, can carry tax and cost implications worth understanding first.
Why it matters. Stablecoins are crypto's most pragmatic and most philosophically awkward invention at once. They deliver the original promise — borderless, near-instant, permissionless dollars anyone with a phone can hold — yet the dominant model does it by tethering right back to the dollar and the institutions cypherpunks sought independence from. Whether that handshake carries crypto into the mainstream, or lets the mainstream quietly capture crypto, is one of the space's biggest open questions.