Keeping the blockchain going requires enormous amounts of electricity, which contributes to Climate Change greatly. Unless it can solve this issue, it must be shut down for the survival of humanity.
https://en.m.wikipedia.org/wiki/World_energy_consumption
Bitcoin mining energy consumption: 73.12TWh
https://digiconomist.net/bitcoin-energy-consumption
Percentage: 0.0433897661%
I wish people would actually do some research before making hyperbolic statements like this.
edit (percent fix and formatting)
If you find it useless then sure vilify it, but not everyone feels that the creation of an entire industry that has allowed certain people financial freedom is a drain. I feel there are much bigger fish to aim an ecological spear at.
(updated the previous comment to show production not consumption btw)
Seeing as most everyone's information used to access credit is available on dark sites, I'm willing to go long on cryptocurrencies.
When demand abates, the electricity requirements will follow.