There is a very distinctive and important difference between McAfee and Elon musk.
Elon must for all his antics on twitter hasn't actually done anything illegal or wrong, all he does is make occasional tweets about a crypto he obviously likes, but this isn't a form of paid promotion of any sorts.
McAfee is very different in that regard, this man has actively promoted projects that turn out to be extremely poor and a lot of people end up losing millions of dollars in cryptos
You should blame yourself if you take Elon's tweets too serious and use it as a financial advice because it was never meant to be one.