[Crypto exchange Lykke shuts down trading after $22 million in suspicious funds outflow] Golden Finance reported that on June 6, the British cryptocurrency exchange Lykke shut down trading, citing "unauthorized access" to its platform, the latest sign of cryptocurrency hackers using private keys. Network researcher SomaXBT first reported the incident, saying the exchange was closed two days after being hacked. MetaMask developer and cryptocurrency defense expert Taylor Monahan said the exchange had suffered $22 million in suspicious funds outflow.