As a matter of interest. What makes you think that someone might want to steal them?
NFTs, in themselves, have no value except that they might be associated with something that has value.
Well i don't know, I mean some people could use it to make money out of it. I know some guys here in Africa that sell books that are available online for free, some of them sell books that are available for free in some apps like Telegram, and others sell things that I might already have, because I'm part of a Digital Marketing community that I paid for and they give you lots of E-books.
I mean I can understand if people are poor and are humble and are just trying to survive, but I'm not rich at all, I'm actually jobless and I've either used a lot of research, skills and effort to make these pictures, also not all of them would be available for free so it does cost money. I mean why would I give such things away for free to strangers or people who can profit from my own work?