AG Schneiderman sent letters to 13 exchanges including Coinbase and Bitfinex asking for information on their operations.
Bitcoin Gold's debut has some quirks.
"Please be my Robin Hood."
The community questioned the Robin Hood scheme to donate $585,000 worth of stolen cryptocurrency, suggesting it could be an attempt to launder the money.
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A multi-million dollar hack has some bitcoiners weighing their security options.
The popular Hong Kong-based exchange Bitfinex revealed this week that 120,000 bitcoins were stolen after its system was breached.