Crypto is a solution to establishing trust in a decentralized ledger system: proof of stake and proof of work prevent people from adding fake transactions to the blockchain.
It’s just a natural consequence that this creates scarcity.
It establishes both trust by separating it from mistrust (paranoia if you will) by making the division explicit and assigning trust to some people and operations and not others.
If you think it's concerned about screens, you're wrong. It's concerned about "did this person really do this"?
A screen isn't software. And indeed, I can't. There are specific parties concerned with building postboxes and screens, and those have no reason to be the same as those delivering mail or writing blockchain software.
