Bitcoin mining is a massive energy sink, especially since it uses the proof of work system, meaning that every transaction necessitates a ton of computation spent just calculating essentially pointless hashes (proof of work also allows mining). And because it’s so easy to speculate with, its value is massively unstable, so very little actual purchases are being made with it compared to speculators, and no one in their right minds would put their actual savings in it. For these reasons, it’s kind of useless as a currency and because of mining, it has an enormous carbon footprint which is fuelling what is essentially the world’s largest casino. IMO, it’s time for Bitcoin and similar proof of work cryptocurrencies to die and be replaced by cryptcorrencies that are designed not to take massive amounts of computing power to work, and isn’t mineable.