> Who cares? If people want to play in Bitcoin, what difference does it make.

The externalities. This very thread is about how Bitcoin is messing up power grids and will soon be responsible for a non-negligible percentage of Earth's entire power usage (and the attendant pollution). It's not consequence-free fun.

Did you read the article? I believe it highlights the difference it makes.

It'll force us to fix our infrastructure and be prepared for the future, sounds like a good thing.

Preparing the infrastructure for uses that it was never intended, and most people will never use, doesn't sound like a good thing to me -- it sounds like a waste of money.