PayPal USD (PYUSD), a stablecoin issued by Paxos, has experienced a significant market cap increase, surpassing $2.32 billion as of September 28, 2025. This marks a 66% rise in just one week, driven by PayPal's strategic partnership with Spark to boost PYUSD liquidity. The stablecoin's market cap has grown by over $500 million in the past three days, according to Coingecko data.