So some properties in japan once crashed after a boom?

As opposed to 80-100 years of devaluation of the money that you earn, save and spend?

A stated above 'the greatest trick the Keynesians ever pulled off was making everyone fear even the slightest deflation, while convincing them that year-in, year-out inflation as not only natural, it was a good thing.

The main benficiaries of inflation are the people who get to spend the newly minted money first - because they get to use created money to buy assets at the valuations for the existing amount of circulation. By the time the inflation works it's way down the chain, your cup of coffee has jumped 50c but you haven't had a commensurate increase in income.