Actually Elon Musk is not the only rich famous person who supports crypto more than fiat. Mark Cuban, Robert Kiyosaki, some rich politicians etc. Robert Kiyosaki said that "I'm not betting on Bitcoin, I'm betting against economy. I'd rather have Bitcoin than dollars right now".
When there's a good opportunities for sure there are many billionaires behind it, some are quitely monitoring the market and
continue enjoying there benefits without revealing their names.
You mentioned those known names who are behind this industry and for sure there are more rich and famous who don't want
to have media exposures unlike Musk.
Not all rich people who buy Bitcoin want to be known to the media or the public like Elon Musk, I believe that many famous and rich people have
bought Bitcoin. But they have their own reasons for remaining anonymous, therefore the price of Bitcoin can be very high, this must be
the contribution of the rich. Because like you said where there is an opportunity to make money, there will be many billionaires who want to take
the opportunity.
We just known them as "whales" or "big players" in crypto. Even big companies are little by little adapting the changing environment of businesses. They slowly obtaining assets from crypro because they know that the potential of crypto to over power fiat is really high and when that time comes, they already have an asset in crypto market.