Bitcoin is up 35% since Memorial Day, and 133% since March 15, the date when widespread U.S. closures began because of the coronavirus pandemic. Altcoins are up even bigger.
Cryptocurrency scams on Twitter are nothing new, and they have targeted prominent accounts in the past.
Former CFTC chairman Christopher Giancarlo says in a new legal paper that the cryptocurrency XRP doesn't qualify as a security. But his argument comes with a grain of salt.