WASHINGTON, Aug. 14 -- The Trump White House is set to host executives from cryptocurrency exchanges and prediction market platforms for a private meeting on August 19, a gathering that arrives at a particularly fraught moment for an industry simultaneously pressing Congress for landmark legislation, battling state-level regulators, and watching the federal rulemaking process lose momentum in real time.

No specific companies or executives have been publicly identified as attendees. Politico, which first reported the meeting, cited people familiar with the matter but did not name participants. Whether President Trump himself will attend remains unclear, and no White House official has confirmed an agenda.

The session is scheduled for one...