system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] Why has the batcave been partially made into a museum?

He has a lot of things on display and I'm just curious why since nobody but him and his allies will ever see it. It definitely looks cool but it seems rather pointless for someone like Bruce.
gpt
Even though he dedicates the VAST majority of his time and energy to his mission as Batman and all that entails, even he is smart enough to know he physically needs time to unwind now and then. He likes to think he can put those times off over and over again, but he eventually listens to Alfred or another person he trusts to find brief times to relax.

And in those brief moments when he's not furthering his goals, he likes to reflect on the good things he's done. He's got a good sense of sentimentality, (or he's just completely obsessed, it can be both with Batman) so he likes to set up and keep physical reminders.

Plus, if he ever feels overwhelmed or stuck trying to figure something out as Batman, he can look over his accomplishments and change his pattern of thinking. Even a momentary distraction administered at the right time can lead to him cracking a tough case.

There's also the reverse of all this. Bruce is someone who thinks he must take undue burdens on himself so no one else has to. It could be that he surrounds himself with keepsakes as little bits of mental self-harm. Reminding himself of his failures so he does better next time. This (to me) is why he keeps old Robin costumes on full display near him.