Major bitcoin exchanges hit by cyberattacks as record rally makes them a target #bitcoin #cyberattackhttp://www.hitc.com/en-gb/2017/06/15/major-bitcoin-exchanges-hit-by-cyberattacks-as-record-rally-make/?utm_medium=share%20service&utm_campaign=social%20media&utm_source=twitter&utm_content=HITCnews …