Yes, Barcelona young stars can help the team go a long way in the La Liga before bringing up another young players to replace them when they becomes unavailable or worn out. I don’t know how long this their financial crises will take them, but they should not fail to build their young players too because it will help them in the long term.
I think the financial crisis is over. Their expenses are down and their income is very good. They don't have to sell their young stars like Yamal, Pedri, Gavi. The La Liga title this season is very difficult, but they can go further in the Champions League. Next season, with a few reinforcements, they will be a team that will be a candidate for all the trophies again. Building the team on these youngsters is the most logical move, both financially and the basis for success is that the players play together for a long time and memorize their every move. Barca have always won their greatest successes with squads based on La Masia.
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.
If Barcelona can achieve success in the Champions League this season, then of course they can build a better squad next season. Although on the other hand, we remember that Barcelona is not the favorite team at the moment, but luck could be on their side. However, unfortunately Xavi has announced that he will leave next season, reportedly Xavi is no longer able to manage Barcelona due to the financial crisis, which is preventing him from building the squad he wants.