Not sure how it works in the US but apparently in the UK it’s the banks that make up money when giving out home loans and such. So in 2008 I guess fake money was made by banks, to over value shitty new houses, and then investment entities bought these fake money loans as investments. Turns out the entire system was fake and it just collapsed.
The way I see it this is not the case now. Real money was handed over to buy these properties (noted by how many homes were bought for all cash). Money that was redistributed, printed by the government during the pandemic but has now been in proper circulation (thus as real as it gets) and which was paid off to a bunch of property owners who now have this as actual cash (or SPY holdings).