Marcus Aurelius wrote his private journals, which eventually became Meditations, one of the most influential books ever written.
I've spent the last few years writing my own collection of notes, insights, and completely unhinged ramblings many of them inspired by psychedelics, Bitcoin, and long periods of staring into the void.
I can't promise they'll become a bestseller, but if anyone ever gets hold of them, there's a reasonable chance they'll be entertained.
Worst case: confusion.
Best case: wisdom.
Time will tell.