When crypto currency miners poured into the city, the power grid got overloaded and the local authorities had to raise prices drastically. The city finally decided to ban all mining but there are still many rogue miners left, operating from basements around the city. They let the local population foot their costs by mining for cheap and leave when prices need to rise to support the grid.
Mining crypto currencies is morally corrupt and hurts our environment more than anything ever before without generating any value.
https://www.politico.com/magazine/story/2018/03/09/bitcoin-m...
https://www.wenatcheeworld.com/news/2018/feb/23/wenatchee-ba...
https://www.cnbc.com/2018/01/11/wenatchee-washington-and-the...