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.
in my opinion bill gates oppose the lack of understanding of online investment and bill gates is the inventor before bitcoin is there so it is only natural that the bill gates oppose this kind of existence