President Donald Trump said Sunday that he is directing his newly created digital assets working group to move forward on creating a “crypto strategic reserve” along the lines of existing U.S. reserves of gold and oil.

Cryptocurrency prices jumped after President Donald Trump’s surprise announcement he wants the U.S. government to purchase and hold a variety of digital assets in a strategic reserve fund, an announcement that highlights Trump’s growing attempts to use volatile cryptocurrency prices as a barometer of his public support.