Some celebrity endorsements of cryptocurrencies have run into trouble. In 2017, the Securities and Exchange Commission cautioned that some famous people were hyping the virtual currency sales known as initial coin offerings without disclosing that they had been paid to promote them. The commission has since settled charges against the boxer Floyd Mayweather Jr., the music producer DJ Khaled and the actor Steven Seagal.Social media influencers and e-sports stars have also been linked to shady cryptocurrency schemes, accused of pumping up coins just before their value crashes.Coin Cloud’s chief marketing officer, Amondo Redmond, said he hoped Mr. Lee’ …
