New words pop up all the time. If you trawl the internet each day (as lexicographers do) and minus all the words that already appear in dictionaries, you would be left with thousands of terms that never made it in, and never will. Many of them are hapax legomena, words with only one written instance, which will fade as quickly as they were created. But some new words will survive. It is difficult to anticipate what direction the life of a word will take.