According to Protos, Airbnb host Ashley was forced to implement a "no cryptocurrency mining" policy because her tenant installed 10 cryptocurrency mining devices in her house, causing the electricity bill to surge to $1,500 in three weeks. The tenant also installed an electric car charging point and claimed to have earned more than $100,000 through mining during her stay. Ashley is not an isolated case. Many Airbnb hosts have complained on social platforms that their tenants' mining has caused a significant increase in electricity bills.