Yes I think so, who would have guessed the bitcoin price in 2011, and compare it with the current price, that's so incredible, many people have become billionaires because of bitcoin
Sorry, but that's not true. In case of reaching fiat billionaire status on paper with Bitcoin, you at current levels need to hold slightly over 357k BTC. At this point the only entities that can properly call themselves a fiat billionaire, are Satoshi, Mark Karpeles (obviously with stolen coins). If we look further, then the only entities coming close to that are toxic figures such as Roger Ver and Jihan Wu. Other than that I can't seem to recall any insanely large Bitcoin holders.