Tether and Circle control 85% of stablecoin supply as market concentration stays near record highs
Tether and Circle dominate the stablecoin landscape, controlling a staggering 85% of the market. This concentration raises critical questions about the future of stablecoins and their impact on the broader cryptocurrency ecosystem.

Understanding Stablecoins
Stablecoins are a type of cryptocurrency designed to maintain a stable value by pegging their worth to a reserve of assets, typically a fiat currency like the US dollar. Imagine a digital dollar that you can use for online transactions without the volatility that often accompanies cryptocurrencies like Bitcoin or Ethereum. This stability makes them attractive for everyday transactions and as a store of value.
Currently, the stablecoin market is heavily dominated by two players: Tether (USDT) and Circle (USDC). Together, they account for approximately 85% of the total stablecoin supply, which is around $302.9 billion. This means that while there are many stablecoins available, most of the market's activity revolves around these two, making it crucial for investors and users to understand their implications.
Market Concentration and Its Implications
The concentration of the stablecoin market is a significant concern. Tether’s USDT alone has a supply of about $183.4 billion, making up 60.5% of the market, while Circle’s USDC holds around $74.3 billion, or 24.5%. This leaves a mere 15% of the market for all other stablecoins, which struggle to gain traction. This scenario is quantified using the Herfindahl-Hirschman Index (HHI), a measure of market concentration where a score above 2500 indicates a highly concentrated market. The current HHI for stablecoins is approximately 4244, signaling a duopoly.
Such concentration can lead to increased risk in the market. If either Tether or Circle were to face significant issues, such as regulatory scrutiny or a loss of confidence, it could lead to widespread panic and instability in the cryptocurrency market. This is particularly concerning given that stablecoins are often used as a bridge between crypto and traditional finance.
Transaction Volume and Market Dynamics
Despite USDT's larger supply, USDC has carved out a niche by capturing a significant portion of on-chain transaction volume, estimated between 60% and 70% in recent periods. This is largely due to USDC's reputation as a compliance-friendly option, which appeals to institutions and DeFi protocols that require transparency and regulatory assurance. In contrast, USDT is more widely used across various blockchain networks, including Tron and Ethereum, serving as a de facto dollar substitute in many regions.