I would suggest that if you want to share pictures that you might sell in the future, put a water mark on them. Or put them up in a low dbi (50 dbi, no more than 72 dbi) and make the picture small, 2.5X3.5 inches for example.
My husband is a photographer and that's what he does with his shots he has on his website. There are ways to protect pictures that you want to share, but don't want anyone saving. :)