Because coffee has caffeine and maybe because of that you can't sleep. Try to change it to drinking tea (make sure tea that have no caffeine like camomile) because it might help you to get better sleep and the best thing is no addiction.
Try tea and forget about coffee. You can drink coffee once in a while as an experiment if you can sleep on the night.
What total nonsense - and ignorance!
Tea also has caffeine!
If you want to give advice, then first make certain of your facts.
My apologize however, tea caffeine is much more lower than coffee.
And I, in return, apologise.
I enjoy looking for new posters and helping those I see make an effort and, especially, those who have talent. The day I posted the comment, I'd only seen bad posts and when I saw yours, I realised you had tried, but you were just taking a common saying and quoting it without thinking it through.
I should not have posted such an abrupt comment, so, as I said, I apologice
However, I would love to see you try harder to think for yourself, talk about your own experiences and what they have taught you or why you believe something. It is the personalised post that gets the most reactions and upvotes. Those are the ones that will also gain you the most friends.
I hope you enjoy your stay on Steemit.