The Swedish striker is still deciding on whether to take up the option of a 12-month extension, with the Red Devils desperate for him to remain.
It's believed the 35-year-old has big-money offers on the table from China and MLS side LA Galaxy.
He has scored 26 goals this season and is showing no signs of slowing down despite his advancing years.
In an interview with Italy's Fox Sports, he was also asked about the possibility of shock move to Napoli, a club the player has always said he has dreamed of playing for at some stage during his trophy-laden career.
Ibrahimovic insisted: "You never know but I'm happy here (at United) - let's just wait and see what happens."
The former Paris Saint-Germain forward is currently serving a three-match Premier League suspension and will miss United's Sunday lunchtime game at struggling Middlesbrough.