No matter how business minded the Borussia Dortmund management wants to be, they should know that Borussia Dortmund should've been one of the strongest clubs in not just in Germany but in Europe at large.
I think the club should stop the policy of always selling their best players to another club but rather they should build a strong team that'll be major contenders for German and European competition in coming years from now. We must break the deadlock
But it can't be stopped as long as they want to stabilize the balance sheet and make the intimacy every season ka they and don't want to get out of the zone.
Dortmund are actually full of talented young players, it's just that with their condition that every season only wants profit from player sales, then they will continue to do it because Dortmund thinks this is the best way for them to get profit and they can't change it.
Dortmund could stop selling their talented players and try to make greater competition in the Bundesliga, but with such changes they must try to withstand all forms of risk, especially in terms of financial stability that might be affected.
I think it will also be difficult for Dortmund to stop because they have good relations with several top European teams, so when the offer comes and when the team is willing to fulfill the agreement offered by Dortmund then they must be willing to let go of their talented players. I know things like this will only hinder a team from winning the title but sometimes players have full rights to determine their future. These talented players definitely want to play at a club that has a bigger chance of winning titles and also the influence of the environment at the new club can determine their move. I think there is no solution to this problem because each party equally benefits from various sides.