Since he has mentioned about economy, I've thought of inflation instead. When the market crashes, inflation is what I've been thinking of but with that theoretical explanation, it's right and I've understand about the meaning of it. Prices would decrease and that's the deflation that he's telling and I'm thinking of the other effect for the economy. Well, either of the two as long as the effect would be giving negative impact to each individual, it is what we don't like to happen but it's inevitable.
I mean deflation rarely ever happens anywhere in the world; hence it is normal that we mix it with inflation. We had a 2 years period where inflation was so high that, a possible deflation where the prices go down could technically happen of course. Not an easy situation and I doubt it would happen, but if governments try their best to reverse what happened in the past 2 years, and even if not go back to how it once was, at least stop it and take it down a notch, deflation could be a possibility.
Nowadays, capitalism blocks it though, if the prices go down for one thing, the others would prefer more profits, so prices stay high even if they could go down.