Brazil's Largest Exchange Mercado Bitcoin Halts Withdrawals After $40 Million Hack

The first and largest cryptocurrency, created in 2009, with a fixed maximum supply and no central issuer.

Its price swings and adoption by funds and companies make it a bellwether for the whole crypto market.

A digital currency secured by cryptography and recorded on a blockchain, without a central bank issuing it.

Crypto prices are volatile, and governments are still deciding how to regulate it.