Yes, Dortmund always sells their stars. Apart from Bellingham, it will be their regret. I also want to mention Erling Haaland. 51 million pounds, Man City made one of the century's bargains, of the century, an actual robbery. Dortmund is still making that mistake.
Personally, I think they still see the potential of those players. But financially, they are in need. Dortmund forced them to sell their good players. Perhaps they have fewer financial sponsors than the Premier League or La Liga.
The repeated practise of selling Borussia Dortmund star players has alarmed both fans and analysts. Their performance can surely be impacted by the departure of stars like Bellingham and this pattern may eventually make them less competitive. While the club may profit from these deals, many are disgruntled that they are prioritising financial security over winning championships. To remain a top tier club they must maintain a delicate balance especially given the tough competition they face in the Bundesliga. Dortmund problem is to figure out how to pursue on field success while still protecting their talent pool.