Bull shit. You can't guarantee anything. While some of them may, I'd bet most of them don't.
Discussion
It's simple human nature, some of the more intelligent ones know Monero will be similar to Bitcoin in its growth, and development.
That's why they give half-assed arguments against it since they recognize its a good technology.
They're playing the long game where they pretend to oppose it to keep its price artificially low while they continue to buy more of it themselves giving them more time to stack more.
It's simple game strategy, let people increase the value of an asset you already hold in large quantities then one day swap it over for a improved technology, and eventually say "Oops, I was wrong, I guess".