The best-selling financial book writer "Rich Dad, Poor Dad" said Bitcoin would replace the US dollar, which he called "counterfeit money." In the April Sane Crypto podcast, author Robert Kiyosaki said the practice of printing more money in America was to create bubbles that would explode. "I think the dollar is toast because gold and silver and cyber currencies will take it," he said. "The US dollar is a fraud. I think we are watching the end of the dollar. "
https://www.youtube.com/watch?v=unvFvAUCZEUI think it's too early to say that dollar will end soon and crypto will be the substitution for that. printed money or fiat has been used for such long time and people has get used to it, so I think it will not that easy for crypto since crypto, especially bitcoin hasn't been popular yet. In the future, it could be, but still, it's a long long journey to be expected.