> People who trust each other can cooperate together without expending resources on protecting themselves. This is not how security works. You need to consider

> People who trust each other can cooperate together without expending resources on protecting themselves. This is not how security works. You need to consider the adversarial case, not the average case. > Consider Bitcoin - the cost of that trustless system that barely works is mind-boggling waste of electricity The "waste" is actually for the purpose of putting a floor on the cost to trick someone into believing a non-consensus history.