in some places in Asia (i.e. HK), some smart investors will buy multiple units in an very old building, be a slumlord, with the full intention of hoping large developers will buy their share later on to knock down the whole builiding and rebuild (4 floors WWII building become 44 floors high rise).
meanwhile they will make sure that they will have enough influence for the body corporate, so the strata bills will be minimum, and the building will continue to deterioate, geneuine owners who want to sell up cheap and leave and they will buy their units cheap etc etc....
it will take a few years, however the trade off is great. especially when your lending rate is very low.
over there once any party acquired over 80% of all the titles, they can force the others to sell. and the acquisition is complete.