Definitely!
My main
area are modern coins and banknotes. But as a collector I think it's common sense to read about other areas as well (knowing how to identify, grading correctly, know about market value....). This is why I like helping in identifying ancient or
medieval coins or I ask for
help when I'm stuck.
And yes of course, I know from experience that 95% of beginners or people not related to this hobby will be convinced that a 4th century
Roman coin in
Poor grading will worth at least the
price of a new
car.
Just yesterday I failed to convince a guy that is 1942 silver coin (6 g of 0.835 silver, VG-F grade, over 30 millions mintage ) has just the metal value.