Famed writer and economist Robert Kiyosaki has warned investors that the stock markets are about to crash and the US economy is heading into a “depression.”

According to the “Rich Dad Poor Dad” co-author, this will be fueled by the fact that the US Federal Reserve will print billions in “fake money.” “[A] Giant crash is coming. Depression possible,” Kiyosaki tweeted late Sunday.

He also wrote that by 2025, Bitcoin would hit $500,000, followed by $5,000 and $500 price marks for gold and silver, respectively. He explained that this will be “because faith in the US dollar, fake money, will be destroyed,” adding that Bitcoin is the people’s money, and gold and silver are “God’s money.”