An increase in stablecoin supply is a bullish signal for bitcoin (BTC). The increase in capitalization was 1.77% in seven days. The USDT stablecoin, issued by Tether, marked an all-time high on April 21, 2026, reaching a market capitalization of $187.96 billion. This increase consolidates its position as the main stablecoin. The record came after an increase of 1.77% in the last seven dayswhich represented a net injection of 3.26 billion dollars from the previous 184.7 billion, as seen in the graph.
USDT market capitalization for the last week. Source: CoinMarketCap. The growth reflects high investor demand and the entry of new liquidity into the sector. By comparison, its main competitor, USDC (issued by Circle), stands at a capitalization of $78.3 billion, less than half the size of USDT. This gap underlines Tether’s undisputed dominance. This rise in the supply of stablecoins is interpreted as a bullish signal for the market. According to the analyst who identifies himself as CryptoOnchain, from the CryptoQuant platform, “investors are accumulating dry powder, positioning their capital to deploy it in assets such as bitcoin (BTC) and altcoins.” However, not all of the increased supply necessarily translates into immediate purchases of cryptoassets. USDT is also widely used for paymentscross-border transfers and as a store of value, especially among new users entering the ecosystem. The analyst himself offers an optimistic view on the medium-term impact: “This unprecedented level of liquidity provides a solid fundamental basis for possible market growth and an increase in commercial activity.” Thanks to this depth, the ecosystem can absorb large buy or sell orders without generating extreme volatility. With this new high, USDT surpasses its previous record of $187.121 million recorded on December 30, 2025. Its role as an essential fuel of the current cycle is reinforced, ensuring that it remains the preferred instrument to move capital within the world of cryptocurrencies.
