ソース:[1] Tether Looking to Raise Up to $20B, Bringing its Valuation to $500B: Bloomberg (https://www.coindesk.com/markets/2025/09/23/t ...)[2] Tether targets $500B valuation with private placement: Report - Blockworks (https://vertexaisearch.cloud.google.com/groun ...)[3] Tether Weighs $20 Billion Fundraising At $500 Billion Valuation - FinanceFeeds (https://vertexaisearch.cloud.google.com/groun ...)