"Proof of stake is not really any different to the fiat system it's trying to replace." Please elaborate.

"If a money isn't proof-of-work then it implies that some people can create it without doing work" Have you seen how much work goes into being a validator? There is definitely work being done - just much more sophisticated that guessing a random value...

Agreed on crypto not having the physical limitations and on the trend of fiat to inflate. I just can't agree on the other points.