You need to find some one with the crystal ball to tell you the future ! and this person is not in existence.
Property prices will only go up because our cost of living is going up. Anything around you is going down except for the fuel price.
Good areas will always have short supply problem ( BU, SS2, Damansara Jaya, Desapark for eg ). New areas is cheaper but you got to hang and wait say 10-15 years or longer take for example Bukit Beruntung. Some guy said an Airport going to be built there and BAM everyone went crazy and bought there. And when it did not happen, the appreciation did not happen. So much for someone with the crystal ball then !
Whether you buy now or future you still need to incur interest rate unless you can save so much cash in such a short time and buy the house without loan. Is this probable for your situation ? Only you will know.
Take a 15 year period of my own home ownership. My first home i bought 170k about 15 years ago. I have to sell at a loss at 150k cause the area was not being developed and no proper roads. Second home I bought 10 years ago , 330k which I sold 5 year later for 370K did not it cover my renovation cost. My next home 550K I bought 5 years ago, can now be sold 1.2million but the problem is where am I going to buy if I sell since all properties now in good areas have also moved up ? At least with this home I also get to enjoy the appreciation while I stay in it. If I was renting, I would now need to pay 1.2 mil for the same house where 5 years ago was only 550k. So your interest saving will not far outweight the escalation of the price of the home.
Can you see a trend and foresee if your investment will sure make money ? Well all 3 have different predicaments and they are all in Selangor not some funny forsaken place. So buy what you need or you can afford and if the appreciation dont happen at least you got a home under your roof. Not buying will not improve your situation because money cant grow by its own by sitting in the bank.
Hope this help and this is just my personal experience and I am not a financial guru or big time property investor.