Robert Kiyosaki, author of 'Rich Dad Poor Dad,' has expressed optimism about the future of gold, silver, Bitcoin, and Ethereum. He refers to gold and silver as 'God’s Money' and Bitcoin and Ethereum as 'people’s money,' suggesting these assets will increase in value as the traditional fiat currency system faces challenges. Kiyosaki's comments reflect a growing sentiment among some investors who view cryptocurrencies and precious metals as safer alternatives to fiat currencies.