“As Donald Trump prepares to fulfill a lengthy list of campaign promises, the president-elect’s vow to ensure that all remaining Bitcoin is ‘made in the USA’ may prove to be one of the most challenging to keep,” Bloomberg reports. “Trump made the pledge in a post on his Truth Social account in June after meeting at Mar-a-Lago with a group of executives from crypto miners, the companies whose massive, high-tech data centers do the work that facilitates transactions on the blockchain in exchange for compensation paid in Bitcoin or other cryptocurrencies.