Hacker News discussions always mention Bitcoin's energy usage, but fail to consider a couple points about this: for example, the 2nd-largest cryptocurrency, Ethereum, is moving to a model that will use a fraction of the electricity it currently does, and that mining is a far smaller pressure to migrate the renewable grid than other industrial uses of energy. It is, basically, an unconsidered meme. I suggest you do some research on the topic; the Tesla you drive (I drive an EV, too) needs a renewable grid, too.