Earlier quoted context omitted.
Electricity consumption is not an "artificial scarcity"
I mean that artificial scarcity is enforced by a distributed ledger system is by using the concept of a miner. The best implementation we have so far that is electricity consumption because this makes people consume electricity which costs them money. If you don't have this piece then people will subvert the proof of work some other way. For example if you have some type of mathematical problem (the unknotting proble…
if you have to hold a lot of limited thing X (that’s difficult to get; eg $10m worth of ETH) on the very chain you’re securing, then that’s scarcity too.
another benefit here is that you can make a trusted network; that way you don’t have nodes coming and going, you have a group of trusted parties with their own network, and there’s less potential for a 51% attack
electricity and work isn’t the only thing that can be scarce