[gwbas1c]

That would severely limit the potential sellers. Many, if not most, sellers need to make a large lump sum payment when they leave their house. This can either be to pay off a current mortgage payment, buy another property, education expenses, ect, ect.

A family that received a million dollars in cash for a house, but then financed their new home as if they were first-time home buyers, would probably take 10-15 years to spend a million dollars in cash.

It just doesn't make sense, and the details are probably deliberately left out of the article. My (probably wrong) guess is that someone is selling cryptocurrency for paper cash, and that someone else is buying cryptocurrency with funds that are inside the banking system.