>>510144668 (OP)It's called degentrification and it's a very lucrative realestate technique.
You sell overvalued property, typically to non-whites, they tank the value of the property with their mere existence or through worsening public services, it becomes worthless then you buy it back for a 1/10th of what you sold it for, gentrify it again with whites, increase it's value and repeat.