Every single thread about bitcoin like clockwork people will say stupid one-liners like "but at least X has value" or "but X is useful" and like clockwork someone will bring up that Bitcoin has use and value, and then the whole discussion will derail into insults and what-ifs on what-ifs.
Bitcoin has value, Bitcoin is useful. You may not think it is that useful, or has that much value, but it has some. Many feel that it's value is a way to transact without trust, others feel its value is a way to store money outside of any single government controlled currency, others find its value is in the pseudonymity that it can provide, others find that being able to put small amounts of data on a globally immutable ledger is immensely valuable, and many people find its value as a way of gambling on the price.
and no one really has evidence to show how the mining is powered.
The majority are mined in China, and that’s for the utility of cheap coal. If you have some evidence of massive solar farms powering mining in a China, please do cough it up.