Most rich people like Bill Gates and Warren Buffet are against investing in bitcoin or cryptocurrencies in general because of the huge risks due to heavy volatility. I'm very bullish on bitcoin and cryptocurrencies, but it's indeed a huge gamble. "Moon" and "lambo" gains aren't guaranteed. We're just pretty much speculating and hoping that it would indeed rise to very high prices.
Rich people, because only riches wanted to be richer, they only wanted things to be in favor of them. His reason might be for personal interest, for rich interest. But there is nothing for him to be afraid of because as we can see the bitcoin can give us benefits where as not only rich will be the beneficiary but at the same time also poor people who wanted to have a better life. And that is the bitcoin can help to people, it can help im eradicating the poverty around the world which was the number one problem of our world.