Do you need your coffee in the morning to be able to function properly? is that harmless? What about 3,4,5,10 coffees a day? At some point pretty much anything

Do you need your coffee in the morning to be able to function properly? is that harmless? What about 3,4,5,10 coffees a day? At some point pretty much anything can grow in an addiction and will hurt you health: pot, vine, coffee, coke, sweets, bagels with cream cheese... nothing is harmless if you overdo it...