Bitcoin mining a most expensive process where the main elements should need power energies ( electricity and fuel energizes) . Most of the developing countries where it's a threaten to future generations.
Though bitcoin mining is energy intensive, however, people can always opt to use renewable energy sources to supply the energy needed. Treat bitcoin mining industry as another regular industry which needs electrical energy to serve its clients. And you will understand that bitcoin mining is no different than other industries that are consuming power. Aside from that, there are already other human activities that are wasting energy for nothing. Environmentalists and other entities are just highlighting the energy usage of crypto mining, but they forgot to look at the benefits derived from crypto industry.