People have been making estimates, or “predictions” as you claim, since this site started. They are based on data, historical trends, and economic conditions.
If you’d actually read the info on here you would see it’s not thin air. Don’t sarcastically criticize people for interpreting the data and then ask them for answers that you don’t want to hear.
I find it ironic that those most negatively affected by the housing correction point the finger at “nostradamus’s’s’s’s'” who’ve been saying all along it wasn’t a smart choice.