I didn't know at the time either but I have since learned....

I didn't know at the time either but I have since learned.
Stable conditions lead to instability due to people's speculative get rich quick herd behaviour.
There's always been a credit/speculation cycle and driven by that cycles in each industry.
Iron Ore, Coal, Oil, Insurance, Lithium any new technology with a good story regardless of financials. When a lot of money moves in there is a crisis of overproduction caused by the lag from investment decisions to output.
This has happened since Walter Bagehot wrote about the first banks in the 1800s.
In the great depression it was poverty in the midst of plenty, too much food being produced as well as the banking troubles. Farmers couldn't sell their wheat at the cost of production, so people starved.
This is not understood by people in power, when the public bails out fraudsters with free money you end up with bigger frauds and bigger bubbles. Each collapse has been pumped up by more debt, leading to another bigger crash.
Frankly it's a terrifying situation, if you want to understand don't ask someone who wears a suit - ask a chicken farmer who correctly predicted the last one what he thinks about the state of the markets.