The same reason his dad and agent were flying all over Europe speaking to other clubs if you believe the press when he has only been at Dortmund for 18 months into a 4 and a half year contract and was at salzburg for only 1 year .Again people have players moving on before we've even signed them. The last ten or so years shows that players (and managers) stay here because they love it here and win medals here. So why if we sign Haaland why should he move on after 2/3/4 years. Think Kompany, Toure, Zabaleta, Silva, Aguero, Fernandinho, De Bruyne............