There is one thing always confused me: People always say that financial crisis destroyed trillions dollar worth of wealth

Based on general economy definition, only consumable goods and services are wealth, money is just a medium of exchange. So, if a house used to worth 5 million now worths 3 million, the actual wealth (the house) do not change, it is just the price of the house changed, and I think this price change are mainly caused by two things: money supply and people's desire

In my opinion, only war or natural disaster can really destroy wealth massively, any kind of financial loss is just a illusion, since people mistakenly think that money is wealth

The real question is: The country as a whole did not lose any wealth in the financial crisis, but why many people are getting poorer and the real tangible and consumable products are getting less produced?