I don't think your efforts should be seen as "pointless" just because you're the only person who would ever be able to appreciate the fruits of your efforts. Self-actualization is an important part of finding peace with your mortality. Whatever it is you gotta do to get there, you gotta look within yourself to find that. For some people, creating a personal art museum that nobody else but them will ever see is what helps them get there.
I don't think your efforts should be seen as "pointless" just because you're the only person who would ever be able to appreciate the fruits of your efforts. Self-actualization is an important part of finding peace with your mortality. Whatever it is you gotta do to get there, you gotta look within yourself to find that. For some people, creating a personal art museum that nobody else but them will ever see is what helps them get there.