Decentralized Stablecoins: Understanding the Types, Mechanisms, and Examples

 Stablecoins are digital assets that aim to maintain a stable value relative to another asset, usually a fiat currency. Decentralized stablecoins differ from centralized stablecoins because they are not backed or controlled by any central authority. Instead, they use algorithmic mechanisms to maintain their stability. In this article, we will discuss the four types of decentralized stablecoins, their mechanisms, and examples.

Overcollateralized Stablecoins

Overcollateralized stablecoins use over-collateralization to maintain their 1:1 peg against assets. These stablecoins maintain a higher value of cryptocurrency tokens as a reserve for issuing a lower value of stablecoins, which helps to provide a buffer against price fluctuations. MakerDAO, the creators of the DAI stablecoin, pioneered this mechanism. A practical example of how this type of stablecoin works is when a business owner has Ether and urgently needs cash for his hotel business. The owner deposits Ether or other accepted cryptocurrencies with MakerDAO and borrows against the value of his deposits to receive newly generated DAI. However, the biggest risk associated with this mechanism is if the underlying collateral drops in price and loses too much value, the smart contract can be closed, and the collateral will be sold or liquidated by the stablecoin system.

Algorithmic Stablecoins

Unlike overcollateralized stablecoins, algorithmic stablecoins are not backed by anything, and they operate through a dual-token model. The first token is the stablecoin, which is pegged to a fiat currency, while the second token, usually the native token, is designed to absorb the volatility of the stablecoin. When one stablecoin is minted, $1 worth of the second token is burned, and when one stablecoin is burned, $1 worth of the second token is minted. USTC and LUNA are examples of algorithmic stablecoins that have historically not been sustainable because the mechanism is dependent on consistent demand being there for the stablecoin. Once the demand disappears, the stablecoin and its token collapse.

Fractional Algorithmic Stablecoins

This type of stablecoin tries to maintain its peg by being partially backed by collateral. Fractional algorithmic stablecoins use a similar mechanism to algorithmic stablecoins. Still, the main difference is that a portion of the stablecoin's supply is collateralized by an asset, while the rest is algorithmic. FEI is an example of a fractional algorithmic stablecoin.

Seigniorage-Style Stablecoins

Seigniorage-style stablecoins use a similar mechanism to algorithmic stablecoins. However, instead of a dual-token model, these stablecoins use a single token that is designed to have an increasing supply. The stablecoin's price decreases when the supply is too high and increases when the supply is too low. As the supply of the stablecoin increases, so does the value of the seigniorage. AMPL and BASE are examples of seigniorage-style stablecoins.

Conclusion Decentralized stablecoins use algorithmic mechanisms to maintain their stability, unlike centralized stablecoins that are backed or controlled by a central authority. The four types of decentralized stablecoins are overcollateralized stablecoins, algorithmic stablecoins, fractional algorithmic stablecoins, and seigniorage-style stablecoins. While each type has its mechanism and examples, it is essential to note that decentralized stablecoins are still in their early stages, and there are still risks and challenges associated with them.