The Everton full-back was one of the positives from his side's 1-0 defeat to Greece on Wednesday, having caused their opponents problems throughout the game.
Trapattoni was full of praise for the Toffees player after the match and believes that Coleman adds an attacking threat from the back.
"Coleman was fantastic, he was the man of the match," said Trapattoni. "We know him and we have told him he is important to us for the future.
"I have said many times, the midfield of our team is not only the four midfielders; we have two more, the right and left-backs.
"Seamus is fast, he can recover the ball, he has a good personality and at this moment, he has a very good future."
Coleman's Everton travel to Reading on Saturday in the Premier League.