I remember reading a quote from someone a long while back, and I don't remember who it was, but it might have been the Dalai Lama, talking about museums -- that he doesn't want to personally "possess" riches, that he's content instead to visit the riches in a museum, to see them there -- which is the proper place to keep them, where (according to my understanding) they might be secure and beheld by everyone occasionally.

I also thought that it might've meant that he was working towards material goals

I kind of doubt that but who even knows, I would want to read that in context before venturing to answer. There are several ways in which it doesn't sound like the kind of theme you'd find in suttas, but I don't know the Lotus Sutra.

Speaking of material aspirations, and even being the "richest person in the world", I remember reading a quote from someone a long while back, and I don't remember who it was, but it might have been the Dalai Lama, talking about museums -- that he doesn't want to personally "possess" riches, that he's content instead to visit the riches in a museum, to see them there -- which is the proper place to keep them, where (according to my understanding) they might be secure and beheld by everyone occasionally.