Odaily Planet Daily News: Argentina has requested Tether to freeze 3.5 million USDT related to Rainbowex, which is suspected of being involved in a Ponzi scheme affecting thousands of people. This operation involves 22 search warrants and the detention of 22 individuals. Rainbowex misled investors with promises of returns in cryptocurrency, but operates a closed-loop system that denies withdrawals. Investigations reveal that actors were hired to impersonate company representatives at events. (News.bitcoin)