Answers are about a coffee.

Does the coffee harmful for health?
No, science shows about non influences a coffee on health bad, but positive effect having.

Why coffee drinking is a bad mode of life meaning, or bad habit?
A caffeine drinking is other habits, smokers drinking caffeine more,than non smokers, as therefore you meaning a bout a caffeine is a risk factor, no, in disease having other reason.

Does caffeine influence on heart work?
With healthy mode of life, right diet,remedies use,herbs do not influence with cardiovascular damages, atherosclerosis, myocarditis infarcts, arrhythmia, hypertension, and moderate drinking caffeine benefit in heart damages, no data about,that avoiding from coffee will improve a heart work, heart beating often will be not depend as you drink or not drink caffeine, and consult with a doctor always needing.

Caffeine raises pressure.
Yes, heart beating having and scientists shows,that  hypertension risk is passive ode of life, kalium poor in organism, obesity.

Caffeine drinking is a risk for cancer.
No, science this not showed, as drinking of tea regular.

A keeping coffee for saving aroma better at freezing box, as from sun rays,light, humidity, other smells, as if seeds will chop therefore drink coffee right away. Seeds coffee keeps in a refrigerator, caffeine boiling, or keeping within 45 minutes will lost a smell,taste,drink his right away!
 Or keeping in thermos.