Landed can't make good profit anymore in outskirt. For those 2nd hand in core area maybe possible.
Property investment is always location.

Ask yourself that is there anyone will buy from you next time for staying? Your buyer should be someone wants to settle down themselves. Definitely not investor for sure.

You cannot compare with last time, last time we are still a undeveloped country.
land is something static and vicinity within KV is limited. You simply can't create another Kuala Lumpur or Bandar Sunway out of some land. Eg. Cyberjaya?

Unless there is a shift of populations due to government policy such as moving a city to another one. It could happen but rare.

Try your luck to predict another Bandar Sunway or Petaling Jaya.