If you become a historian, pay attention to current events. In my time on earth. I've seen so many changes that were history making it wasn't funny. Technology alone has changed so drastically. I was 2 months old to the day, when the USSR launched Sputnik. I was awake at 3AM at a friend's house to watch Neil Armstrong step on the moon, just a few weeks short of my 12th birthday. I've seen hemlines hide ankles and reveal a LOT! I lived through a time when leaders were assassinated, a president design from office, and more than a handful of recessions.
One thing you will learn: history repeats itself. If you get a chance, study human psychology. Fascinating.