U.S. Senator Elizabeth Warren has called on Meta CEO Mark Zuckerberg to provide more information about the company's stablecoin initiatives, citing a "concerning lack of transparency." Warren's letter highlights potential impacts on market competition, user privacy, and financial stability due to Meta's extensive global reach. Previously, Meta tested stablecoin payments using USD Coin (USDC) in Colombia and the Philippines, requiring users to link third-party crypto wallets. A Meta spokesperson clarified that the company does not currently have its own stablecoin and is focused on enabling various payment methods, including third-party stablecoins. Meta's earlier stablecoin project, Libra (later Diem), was abandoned in 2022 following regulatory challenges. Warren, a prominent critic of cryptocurrency, continues to scrutinize Meta's activities in this space.