Robert Kiyosaki, the author of Rich Dad Poor Dad, has been a vocal proponent of Bitcoin (Crypto: BTC) for years. He has even been buying more this year as he has said that not buying Bitcoin is “the biggest mistake you can make.“ However, Bitcoin is not the only asset he’s been telling his followers about on X, formerly Twitter. In a post earlier this week, he said: “SILVER the best BARGAIN? Silver is not only a precious metal it is also an industrial metal and a strategic metal. With war all around the world demand for silver is soaring. Recently Elon Musks company Tesla just secured rights t…