$40 million hack at Brazil's biggest Bitcoin exchange triggers user refunds.
Context
What happened: Mercado Bitcoin, described as Brazil's biggest bitcoin exchange, said it will refund users after a hack drained tens of millions of dollars. Withdrawals remain frozen with no restart date.
Key numbers: $40 million hack; withdrawals frozen with no restart date.
Why it matters: The exchange says customers will not bear the loss from the hack, while the continued withdrawal freeze leaves users unable to access funds.
What changed
Mercado Bitcoin, described as Brazil's biggest bitcoin exchange, said it will refund users after a hack drained tens of millions of dollars. Withdrawals remain frozen with no restart date.