Binance says it has restored backing for 90% of assets affected by its $6.3 billion hack and resumed phased withdrawals. Cryptocurrency prices declined on Friday as Binance, the world's largest cryptocurrency exchange, sought to reassure customers that their funds remained safe following the theft of more than. Cryptocurrency exchange Binance says it has replenished 90% of the assets affected by its $6.3 billion security breach, marking a significant step in.