As long as you are just posting non-identifiable or mundane daily life stuff I would not worry about someone finding it 10 years later. If it was important enough for you to post today, it should still be important in the future. Who knows, maybe it will even help the person that reads it in the far future get through their life.
Posting relieves the pressure that builds up in your head from all of the thoughts that swirl around and allows you to have room for new ones.
I hope that helps.
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