Why would billionares live in flats.

In delhi someone worth 1000 crores would be having a bungalow in lutyens, round the clock servant and drivers.

Flat is synonymous with lack of privacy, security issues when celebrities move around, absence of private lawns and gardens, among various other luxuries that come with a lutyens bungalow or a ancestral palace in Pataudi.

Sorry although my point of comparison is a middle class flat like ATS, and i wonder how can entry and exist be managed on the sly in case of posh flats.

How does it work in Mumbai, A billionaire, possibly one of the richest in bollywood is living in a flat(not own bunglow), not having a driver round the clock(given the odd hours they keep, it seems strange) at night, going to hospital in an Auto.?

Can someone throw light.

Edit: He has not even bothered to install security systems, alarms and CCTV.....of what use is his 10k CR?