He's not wrong if he makes a stable, gold backed currency. On the other hand, during the last 6 years he has done absolutely nothing visible (key word) to bring about that currency. And when/if this supposedly stable gold dollar he espouses ever does emerge, who can say how much it will be worth relative to what cryptocurrency is worth today. Trump's statement by itself is meaningless without more context. In the current environment of the Federal Reserve Note, you would be foolish not to diversify into crypto assets.