Does it have a single stem, or is it forked anywhere? If it is single to the tip, it should be safe. They only get dangerous when frost damage makes them have forked stems which are liable to split. From what I've read, the timber isn't very useful - rather coarse and knotty from open-grown specimen trees, and throws sparks if used as firewood.
Julie, Norfolks are not used for millwood i'm afraid , but are used for the building of ships masts. I have two norfolk island pines and I hope they get that big, I hope I don't use them for ships mats. Why not just transplant the tree to another location using a crane. Wyatt Reinhart