It seems that Barcelona can indeed get out of the financial crisis if they continue to consistently win trophies, but for now I think they are still struggling with the problem of this crisis and haven't gotten out of it completely. It's true, building a squad oriented towards La Masia academy products can form a golden generation, like a decade ago. Apart from that, releasing young players to overcome the financial crisis is the easiest solution to take, in my opinion Barcelona will not lack young talent at the La Masia academy, and management can promote other young players every season.
Currently Barcelona does not have many solutions even releasing several important players didn't help much because it will impact their performance, as you said building an internal squad might be a good solution, but it takes a long process and time. It's not easy to make a decision in this situation and must find the best solution in the near future, If Barcelona can win the Champions League, maybe that will help a little it's just that it's not easy because there are many competitors there.