Ok and there are plenty of them telling that it delays dementia and Alzheimer's, prevents cancer, and much more. If it's a normal intake you won't have a problem, putting it alongside alcohol and nicotine is my issue.
Discussion
It can be both! Depends on your individual needs / circumstances!
And mostly how much you take for then to be a problem, if it's your normal coffee consumption you'll get the benefits and none of the damages.
There might be people with any healthy caffeine threshold! Is quite individual!