First, the article clearly points out that there is quite a bit more that can happen to him and he's fighting to stay hidden. Second, what movement?
If he now, as a public figure, disappeared, it would be headline news and people might assume the U.S. government eliminated him, potentially making it look more sinister, validating his claims and turning him into a martyr. So exposure provides some security. Nonetheless, he stays hidden because better safe than dead.
But yeah, he also comes off like a grandiose megalomaniac.