Like maryam nawaz, bilawal is also a billionaire and all of it has been inherited/gifted by father or grandfather.
Declared properties are only cost of assets and not actual value in today's market.
This will blow your mind, no wonder Pakistan is a poor country and millions are currently living below the poverty level.
Https://www.thenews.com.pk/print/329465-bilawal-s-billions-all-inherited-or-gifted