The Dane admits his days at Arsenal are numbered.
Olsen said: "It is good for himself if he plays first-team football.
"You don't play football for 50 years, you have to enjoy it as long as possible.
"Of course it is also a money question but a national player has a lot of ambition and wants to play football.
"Nicklas has been injured for a year but he can be a good player again."