Well there is a difference between people not buying anything at all and being significantly less than they are now. Consumer goods and services is only the tip of the iceberg.

How much do you think debt would cost and how easy would it be for businesses to get credit?

Combining a deflationary currency with a growing (or at least non static) economy is bad a everyone who has a basic understanding of history prior to the 1930s can see that. Something like bitcoin would be even much worse than the gold standard.