Well, on the other hand, do you just understand how simple cards work? I for sure don’t and I don’t see why I would need a chip from my provider to access it’s services, if I can get a digital key instead.

My general problem with cryptocurrency is their environmental impact / resource usage compared to traditional payment systems.

I dunno, been seeing quite a few posts from https://indieweb.social/@web3isgreat that do kind of give a bad impression…

https://youtu.be/zb7Bs98KmnY

I’d like to point you to this excellent video by Technology Connections.

Those already exist! Pretty hefty price (compared to your usual ereader) but very much useable. Onyx Boox has a few models iirc