Considering a high volume of the niche industry i believe that is something that has to come, and economic crash is real and it could happen any time soon. I wonder how will this potential economic crash influence the crypto world. How expensive will be the electric bill for mining for example?
Resources are getting more scarce everyday it would get more expensive in the future to run the blockchain no doubt, but then the bitcoin will get more value aswell. More and more people are using sun panels to run the BC to reduce the cost of running it. Also there will be more advanced technology like fusion power and algae energy so that would be less of a problem, but resource like sand will get super expensive. If I had to choose whos country will the least hit from the crash if it happens; russia and japan. Japan has a lot of resource in the ocean to create lcd for phones and computer monitors ( forgot what resource its called )
WaTer will be a big deal in the future.
In deed it is good to have alternative energy sources but for example the solar panels i don't agree with them because making them distrois the nature. Most of the mineral resources used in the hi tec h world are found in Africa and you can see how things evolve there. And regarding the sweet water in dees, it will be horrible at some point, i have the felling that this generation likes to comfortable, no effort in living and preserving for the future.
For now solar panels are bad for nature I agree, but lets hope that in the future there will be cleaner methods of making them. About the water. Big company's like Nestle wants to make it a commodity...