By the way a good comparison, both players are in good form at the same age, Bale has already made the mistake of staying then, hopefully Depay won't repeat it. What can be done in that case? Nothing, just train hard (but I doubt they'll put you in the main squad because there are more attractive players), or hope that his rival gets injured
Actually, it's quite wrong to compare him with Bale because if I look at it from the other side, Bale also left because his contract was not renewed instead of going straight to find a new club there.
When it comes to Depay it is something else because indeed I also quite agree if he leaves considering his age he is still able to compete for positions but not at Barcelona.