Jack Zhang, co-founder and CEO of the enterprise payment and financial platform Airwallex, posted on X: It's time to short Circle. Previously, Jack Zhang had expressed doubts about the practicality of stablecoins in mainstream currency cross-border transactions, questioning their real-world utility in such scenarios. According to U.S. stock market data, Circle's share price surged above $210 at one point this week, recording a nearly 40% single-day increase and pushing its market capitalization above $48 billion.