Robert Kiyosaki, author of the best-selling personal finance book "Rich Dad, Poor Dad" is a strong advocate for investing in bitcoin. After achieving success with finance books, the writer began sharing predictions of a major collapse of the global economy. To protect himself from this, he recommends three investments, one of which is bitcoin. Now, Kiyosaki has shared with his followers on X when he bought the cryptocurrency for the first time—and the amount may surprise.