Cryptocurrency mining is done by specialized computers that process transactions and secure the network. Miners benefit not only from price appreciation but also increased adoption as transaction fees collected go up with increased usage.
A microgrid is a decentralized group of electricity sources that can disconnect from the centralized electric grid and operate independently.
From a financial standpoint cryptocurrency mining is essentially turning electricity into money after the initial investment of mining hardware. The lower the electric price the more profitable the operation is.
After an initial investment in a solar and wind farm free electricity is produced from the sun and wind dramatically increasing mining profits.