I don't know his motives. The most charitable interpretation is he believes he is seeing something that the rest of us aren't, and he is willing to nobly risk

I don't know his motives. The most charitable interpretation is he believes he is seeing something that the rest of us aren't, and he is willing to nobly risk his reputation in order to warn us and, thus, protect us. He is doing us a service at great cost to himself. That is certainly possible. I think it is more likely that he likes attention and money. This isn't an insult to him - I also like money, and sometimes, attention. For only $29.99, you may buy his new book, "Pandemia: How Coronavirus Hysteria Took Over Our Government, Rights, and Lives". The link is available in his Substack. (And presumably would have been available in his Twitter account, had Twitter not suspended it.)