I would go with the cash, as unless someone is seriously gaming the system about 1 in 8 human beings on the planet would have to create an account and follow the celebrity for them to get 1 billion followers assuming only real accounts counted.
Even a twitter verified Jesus Christ, son of the one true God would have a somewhat difficult time drumming up 1 billion twitter followers, and he has at least that many followers in real life.
On the other hand, if we keep inflating the currency the way we have been in recent years (2008 onwards), Bezos could be worth $1T just by the dollar having less value.
Even a twitter verified Jesus Christ, son of the one true God would have a somewhat difficult time drumming up 1 billion twitter followers, and he has at least that many followers in real life.