Texts can artificially be copy protected, by placing a transparent Image block above the Text block: that makes selection and copy uneasy. However, a person having some technical knowledges will be able to bypass it.
You could otherwise create an image with all of your sensitive contents. This will unfortunately impact your SEO, for Google cannot read the texts within images.
Anyway, a person that wants to copy your content, will still be able to do it manually (by reading and re-writing). It is thus unnecessary to use sophisticated means in order to protect texts.