Just over a year ago, while sitting around a table in an ornate meeting room at Mar-a-Lago, David Bailey and a group of top Bitcoin executives made a pitch to Donald J. Trump.

They were looking for a savior.

For years, cryptocurrency companies had endured a sweeping crackdown in Washington — a cascade of lawsuits, regulatory attacks and prosecutions that threatened the industry’s survival.

Mr. Trump wasn’t an obvious sympathizer. He had once dismissed Bitcoin as a “scam.” But he welcomed the executives into his private club in Florida because the industry had suddenly gotten his attention. Mr. Bailey was mobilizing crypto investors to vote for Mr. Trump and had called on his colleagues to raise $100 million for the election effort.

At Mar-a-Lago, Mr. Bailey brought along representatives of several large Bitcoin mining firms — an energy-guzzling sector that has drawn noise complaints and environmental concerns. They pitched Mr. Trump on the economic benefits of Bitcoin, before pivoting to a bold request: Could Mr. Trump write a supportive post on his social media site?

The proposed language was included at the bottom of a bullet-pointed meeting agenda, according to a copy reviewed by The New York Times. Mr. Trump said he would “consider it,” Mr. Bailey, who runs the digital currency firm BTC Inc., recalled in an interview. “We had no idea if that was going to happen.”

That night, Mr. Trump fired off a Truth Social post containing the exact message proposed by the executives: “We want all the remaining Bitcoin to be MADE IN THE USA!!! It will help us be ENERGY DOMINANT!!!”