If you have a fixed money supply that is infinitely divisible, prices would be expected to fall due to deflation and increased purchasing power. Relative values of bread, hour of work, barrel of oil and a house should remain the same (with the caveat that their real values actually change - eg if we become an electric car economy then the relative price of oil in big macs will change). This makes no difference to anything of substance, it is just mathematics and psychology. The only real substantive issue is with debt repayments with deflationary currency, in which case I'd advise thinking hard about your loan terms.