Go watch the big short. I think this is a globally free movie on YouTube https://youtu.be/cvdjXCCHdSQ

Idk it might be a premium subscribers thing though. Regardless:

Basically what the US did in 2008 allowing banks to bet on the success of the housing market and bet on their bet, and bet on the bet of the bet of the bet, they started doing AGAIN in 2015. Housing market is through the roof again just without the east approval process this time. It's wild that the CDO infrastructure has been brought back since then.