In a deflation the price of everything goes down. Eventually.
With the possible exception of dollars.
The whole world is betting on the US and its currency.
Cash is truly the king.
It is until control over markets, which have seen price manipulation for years, is lost. Then significant revaluations of everything, including the value of currency, in relation to real goods and services will occur.
Humans have never witnessed what may result if this occurs at this point in our history.
So much now depends upon such a myriad of specialized functions and external dependencies, it could prove existential to our complex way of life.
Just sayin'...