Beckenbauer is a troll at times. In a lighthearted way. There is also a difference in culture so I'm sure it got taken more seriously than intended. Just ignore him. Every now and then the Kaiser just has to add his Senf to something.
"Will I end my career at Juventus? I have extended my contract in January for two additional years, I believe Juventus is my home. When you stay so long in a club you create very strong links with people at the club. You feel like being part of a family. I don't know when I will hang up my boots."