Avatar, as we have discussed, is now the highest grossing film of all-time, no matter which chart you are discussing.
But let's look at total admissions, which relates to the total number of tickets sold.
Thus far, Avatar has been estimated at about 61 million in terms of admissions.
Titanic's total number of admissions at the end of its theatrical run: 128 million.
Avatar is never gonna get there.
Perspective...that's all I'm sayin'...