EU exchanges are delisting Tether (USDT) due to the Markets in Crypto Assets (MiCA) regulation, sparking concerns about market turmoil. Tether, the most liquid stablecoin, faces scrutiny for not meeting MiCA's requirements, forcing exchanges to remove it by December 30. The delisting could limit services for EU users and potentially hinder investments in the EU's crypto market. Tether plans to launch a euro-based stablecoin to comply with future regulations.