Barcelona's current club concern right now shouldn't be about signing a high profile players like Kylian Mbappe when the club's financial strength is on the decline.
Barcelona already has good squad, they don't really need new players. Moreover, they are in a crisis of financial, they must avoid to spend unnecessary spending. In the CF position, they already have Lewandowski, so they don't need Mbappe. If Barcelona signs Mbappe, they only waste money, it also risks their financial stability. Mbappe has a big salary, Barcelona will be difficult to pay his salary.
They have a manager in Xavi Hernandez who believes so much in his young team to deliver spectacular performances just like they've been doing since his arrival as the club manager. Barcelona should critically look in to what they can do as a club to help their and recover from their financial ruins
Indeed. Xavi Hernandez actually prefers to have young players, but they seem buy old players in the current transfer window (Ilkay Gündogan, Iñigo Martínez). I think it is because Barcelona is difficult to buy young players, most of top young players are expensive. However, since Xavi Hernandez became the coach of Barcelona, he already improved Barcelona performance significantly.