Billionaires are the people that they never gonna miss any opportunities to make money, so Bitcoin is the new major that they could try and trust me , Bitcoin already made many normal people becomes billionaires. So Bitcoin billionaires actually are investing much in Bitcoin and they deserved it cause they're the parts which help Bitcoin become strong like today. It's a long process to improve the position of Bitcoin to the world for now. Things are going like that with Etherum for now but Etherum is having a easier way to development cause the world arealdy accepted crypto currency even it's slowly.