If you stay in capitalism society long enough, you should know n

If you stay in capitalism society long enough, you should know nobody knows/sure share price/house price will higher or low next month or next year. They lie if they said they do

Or, even they don’t know what they are talking about ( never ready news paper ) like the one below claim property price has only one way to go UP.

Can I ask, how many % US property price goes up in 2009?