It's a hedge against the collapse of the US. Not that they aren't trying to use that land to fuck with us as well.

just sitting on them to drive up prices and fuck with the rental market.

And the land market, the farm market, the food market, the family-owned property market, and so on. One of the primary ways for the poor/middle-class to gain wealth/power is to own land/property. And they cannot have that, hence the buyups.

One of the reasons for genociding the Kulaks is because they were self-owned farmers who owned their own land, properties, and were self-sufficient(generally speaking). And they were White. A major threat to any totalitarian.

They've been fucking over farmers for decades now. And now's their chance to collect all the land they can.

Here is the system:

Yes, they buy up properties and sit on them for a few years, renting some, hiding others. Then when prices rise, t some point they sell them off to suckers with easy interest. For a decade or so, the suckers pay their monthly notes to the jews, then the jes begin to squeeze the economy with high interest and other expenses. The economy contracts, all the suckers lose their jobs and then they lose their home back to the same jews. Repeat the cycle again and again. That $75k home resells for $150k, then again the next cycle for 250k Each tie they sell, they rape the regular stiffs. And half these single family homes earns them millions. Blackrock and those others always win until the civilization will collapse. They will just grab the loot and continue in other doomed nations. Forever.