Watch the video related to big real estate

The Housing Bubble bursts on a speculator. Parody using a clip with Hitler as the real estate investor. He bought a house to flip, faces foreclosure, and now wants to get bailed out. Parody Fair Use of clip. See: www.publaw.com/parody.html

Help answer the question about big real estate

Anyone know how big is the real estate crisis in the US and Worldwide?
I kept reading there's going to be a huge collapse of the banking system worldwide. How can this happen and how big of a possibility is this?