Brazil's largest crypto exchange Mercado Bitcoin halts withdrawals after a breach involving $46M+ in assets, per Arkham; Tether froze 4.5M+ USDT in response (Jason Shubnell/The Block)

Jason Shubnell / The Block:
Brazil's largest crypto exchange Mercado Bitcoin halts withdrawals after a breach involving $46M+ in assets, per Arkham; Tether froze 4.5M+ USDT in response  —  The exchange paused deposits and withdrawals after the incident, while Tether froze more than 4.5 million USDT linked to the attacker.