Trump Jr. Invests in Social Media Firm Building Crypto Hoard

Donald Trump Jr. bought shares of a money-losing social media firm that’s building a Bitcoin stockpile, the latest in a series of investments the president’s family has made in “crypto treasury” strategies.

Trump Jr. owns 350,000 shares of Thumzup Media Corp., the Los Angeles-based company said in a filing Wednesday. The stake was worth more than $4 million at yesterday’s closing price of $12.36 a share.

Trump Jr. made the purchase on the recommendation of his investment adviser and has no other involvement with the company, according to a person close to Trump Jr. who asked not to be ...