buyin a condo in a downtown area of any city for personal use is not an 'investment'.
The annual service charges and refurb costs in 10,20,30years time etc will mean you're unlikely to make a 'profit'.
renting the place out short term is going to cost more time than it's worth, and using an agent will at best give you single digit yield (before costs).
the only reason to buy one is if you plan to use it a lot and don't like to stay in hotels.
all that applies to central london just as much as makati.
if you want to invest, why not buy shares in Ayala? (or SMB)