Hackersstole $6.3 billion from Binance, the world's biggestcryptocurrencyexchange, in a record digital asset theft. Here's what we know so far: What happened ? About $6.3 billion of cryptocurrencies were drained from wallets that Binance uses to process transactions, according to the exchange and expert analysis of blockchain records. Read moreBinance hit by $6.3 billion security breach in pot