You still didn't answer my question. If your posts are not opinionated, what are they? I'm prepared to listen to you on why you think all crypto currencies are bad, but you seem unwilling to reciprocate?
You may perceive your one line answers to be common knowledge, but I see no evidence provided to back them up. From a 5 mark math question, the answer is worth 1 mark and 4 marks are for showing your working. Even if you are correct, you show no workings.
The fact that you just assumed all crypto currencies are mined, aka proof of work, which I agreed with you is an outdated consensus method, the original consensus method, proves that there is plenty left for you to learn if you are willing/open to it. What technology is perfect in its first iteration?
As an example, vechain (currently rank 23) is implemented in china's 5 year plan to reduce their carbon emissions to 0 by approx 2050. Vechain is not mined, it does not rely on warehouses of gpus or asics for consensus and is being used to try and control the output of one of the world's largest polluters by incentivising practicing sustainable operations and manufacture. Is there no hope for this 'cryptocurrency' either?
Neither do I consider chia's approach, proof of storage, a viable approach (in its current form) . Is it better than bitcoin's proof of work? Probably, but it's not the answer, and the fact that it is rank 230 and dropping bears that out. It was a novelty that wore off and probably won't recover.