Circle's USDC supply has surged 72% year-over-year to $75.3 billion, with Q4 transaction volumes reaching $11.9 trillion. Despite this growth, Circle's revenue model is heavily reliant on reserve interest income, which constitutes approximately 80% of its $2.7 billion annual revenue. This dependency exposes Circle to significant risks as the Federal Reserve enters an interest rate cut cycle, potentially reducing revenue by $800 million to $1 billion per 100-basis-point decline. Additionally, the proposed CLARITY Act could ban stablecoins from paying interest, threatening Circle's regulatory advantage. This has already impacted Circle's stock, which dropped 20% in a single day. With traditional financial institutions like PayPal and JPMorgan entering the stablecoin market, Circle's competitive edge is under pressure. The company must pivot towards transaction fees and enterprise services to sustain its growth as interest rate and regulatory windows narrow.