Citi and Western Union are at the forefront of Wall Street's stablecoin initiatives. Citi has partnered with Coinbase to enhance onchain payment solutions, marking a significant step in integrating blockchain technology into traditional financial services. Meanwhile, Western Union is developing a settlement network based on the Solana blockchain, aiming to streamline and modernize its transaction processes. These moves highlight the growing interest and investment in stablecoin technology by major financial institutions.