Valued at over $2 million USD, the 600 Bitcoin miners disappeared from a data center in Iceland, and police are suspecting an inside job.Local media has dubbed it the "Big Bitcoin Heist" - which has already seen 11 arrests of those suspected to be involved. Among those suspects - the security guard in charge of protecting them.But even stranger - all those arrests, and still no miners recovered." says Icelandic police chief Olafur Helgi Kjartansson.Mining hardware has become a target of thefts worldwide, since those who steal it don't need to resell it to make a profit - they can just use them to mine Bitcoin themselves.Over the last couple years Iceland's inexpensive electricity has drawn in Bitcoin mining operations from around the world.