Only 99 years leasehold property owners will have to worry about their property value dropping to ZERO for now (and hence have to convince others to buy such worthless properties so that they can flip their old "babies" to them).......
People buying Freehold have NO such worry about their "babies" becoming old.........
Not even for 999 years leasehold as many of them still have >900 years lease left (and their depreciation would be like 0.1% per year as compared to 99 years leasehold having depreciation of 1% per year)...........