The White House responded to a list of questions from Reuters with a two-page fact sheet describing Trump's executive order earlier this month on digital financial technology. It did not address questions about the trading fees.
Trump has promised to become the first "crypto president" and make America the "crypto capital of the planet" by overhauling regulations and promoting ownership of digital assets. Several key figures in his administration, cabinet and circles hold crypto or have ties to the crypto industry.
But the combination of large dollar amounts around his crypto ventures and their opaque nature has also sparked criticism from ethics experts and Trump's political opponents in the Democratic party.