Tether says it helped freeze $550M in Iran-linked USDT this year Özet: Kripto piyasasında önemli gelişmeler yaşanıyor. Stablecoin issuer Tether said it helped authorities freeze nearly $550 million in Iran-linked USDT during 2026, as a Senate Democrat called for an investigation into the stablecoin issuer on Monday. In a statement on Monday, the company said