Cryptocurrency interests, which have benefited from the Trump administration’s dismantling of a yearslong government crackdown and from the Trump family’s financial interest in the industry, appear to have been the most generous industry, accounting for nearly $45 million in donations to MAGA Inc.An affiliate of the exchange Crypto.com gave $10 million, while the crypto services company Blockchain.com donated $5 million. The venture capitalists Marc Andreessen and Ben Horowitz, who are heavily invested in crypto, gave $3 million each. Ondo Finance, which has a partnership with the Trump family’s crypto company, donated $2.1 million to MAGA Inc., on top of $1 million to Mr. Trump’s inauguration.