Mining companies are looking for cheap electricity places around the world, and Sweden currently enjoys the cheapest data center electricity in Europe. Other giant tech companies already did something similar in the past, such as Facebook with its Luleå data center, so definitely a smart move!
"The Future of Mining is jointly owned by blockchain industry companies NGPS and NIDC, and already runs a cryptocurrency operation in the US. The company has been looking for a location with access to cheaper power - and Sweden currently enjoys the cheapest data center electricity in Europe."
More info, here: http://www.datacenterdynamics.com/content-tracks/power-cooling/northern-sweden-to-get-a-35mw-cryptocurrency-mine/99043.fullarticle