Say we trade and I give you an apple. In return you give me a note saying "this note is a proof wodenokoto owns me one apple and can be exchange for one apple at any time". What good does making this note depreciate over time serve, except as a pressure for me to demand you return the apple as soon as possible?

It acts as a mechanism which nudges me to lend less apples overall. If inflation is good, why not ramp it up to 200%? At that level it's clear that nobody would accept money and barter would take place instead. And my thinking goes that it is also bad at those lower percentages, except to a lesser degree. I don't see how it can suddenly turn to positive at, say 10%.