Billionaire backer sues Trump family’s crypto firm over alleged extortion BBCCrypto Billionaire Accuses Trump Family’s World Liberty of ‘Criminal Extortion’ WSJCrypto billionaire Justin Sun sues Trump family’s World Liberty Financial, alleging fraud CBS NewsBlockchain billionaire Sun takes Trump family’s crypto firm to court ReutersBillionaire sues digital currency venture co-founded by Trump and sons for illegal account freezing The Guardian