Bitcoin is now a frequent topic for discussion and with bitcoin you can get a good profit if you know how to work with bitcoin
This is nonsense. What are you talking about.
In fact, banks use more electricity to work than mining coins and keeping server online and banks need server online too. There are many new technology that can help cryptocurrency save more electricity.
Well yea. Electricity can cause global warming by making chemistry stuff and blowing up to the atmosphere. but there is nothing we can do with this situation.