World Liberty Financial has filed suit against the Chinese crypto mogul. The Trump family's flagship cryptocurrency venture filed a defamation suit on Monday against Chinese crypto mogul Justin Sun, escalating an ongoing legal and social media feud with one of the company's most notable investors.  Sun sued the Trump-backed firm World Liberty Financial last month , accusing its officers of improperly freezing his investment in the firm's digital tokens. World Liberty Financial denied those claims publicly and on Monday accused Sun, in a lawsuit filed in Florida state court, of embarking on a "scorched-earth pressure campaign against World Liberty."  "Sun weaponized his money and his influence within the industry, hiring influencers and deploying fake social-media 'bot' accounts to amplify his lies," the suit asserts.…