An attendee wears a necklace at the Bitcoin 2021 Convention, a crypto-currency conference held at the Mana Convention Center in Wynwood on June 04, 2021 in Miami, Florida. (Photo by Joe Raedle/Getty Images)
LONDON, ENGLAND – MAY 30: In this photo illustration, a visual representation of Bitcoin cryptocurrency is pictured on May 30, 2021 in London, England. Bitcoin is a decentralised digital currency, which has been in use since 2009. (Photo illustration by Edward Smith/Getty Images)