Caffeine has a half-life of about six hours so it can affect your sleep without necessarily knowing it leading to bit of a vicious circle. If you are interested, Dr. Peter Attia has a three part episode with Dr. Matthew Walker on sleep. It changed the way I prioritize getting sleep.

Why not both? It can help, but it does not fix the underlying issues. And those underlying issues may have long term health and energy conseqeunces.

That said, while I've cut back a lot, you can pry my energy drinks out of my cold, dead, caffinated hands.

If you want the best effects of caffeine you have to cycle it. Save it for those special occasions where the real positive benefits of caffeine can work for you and the negative long term effects don't work against you.