Years ago I was a coff-alholic - I consumed significant quantities of coffee daily, with little regard for how much I was actually drinking. Then at some point, maybe about 15 years ago, I realized that the rush of caffeine was less energizing and more stressful than what I wanted to live with. I bailed out and felt much better over time. One problem is that I really enjoy a good, hot mug of fresh, black coffee.
Since adjusting my coffee consumption, I've ebbed and flowed between decaf (it can really be a poor stand-in for regular coffee) and no coffee at all. Recently, I've found a better middle ground of a cup or two a day, several days a week. Not nearly the highs and lows of caffeine I experienced years ago.
So is coffee good for you or bad for you? The answer is really a bit of both. Much depends on how it is prepared (high-quality water and fresh ground, appropriately roasted beans) and how much we consume. There are great anti-oxidants in fresh brewed coffee, and numerous, everyday health benefits.
Check out this article from Dr. Josh Axe on the top 8 Health Benefits of Coffee. Coffee is great for heart health, liver health, and controlling things like asthma and Type 2 diabetes. Beyond those, coffee increases energy and mental concentration, fights depression and improves athletic performance.
The key to benefiting from coffee consumption, like so many things, is moderation. Thankfully, I've landed at that place of moderation myself, after all these years, and I think I'm at a sustainable place. If you're a coff-aholic, like I was years ago, consider cutting back to a few cups of coffee a day. If you're not a coffee drinker, no need to start, but maybe you'll develop a taste for the aromatic, tasty brew that has revved up societies for centuries.
By the Way
Be aware of numerous coffee look-alikes, that aren't the real thing. A lot of high-volume coffee vending comes from reconstituted coffee concentrate that may contain stabilizers, preservatives and 'natural flavors' to extend shelf life and yield a good-tasting end product. It's not the real thing, even if they've mimicked good tasting coffee.