© Bloomberg Key Speakers At Bitcoin 2021 Event(Bloomberg) -- Cryptocurrency podcaster Luke Martin said he caught Covid-19 during the Bitcoin 2021 conference in Miami last week, one of the biggest events to take place in the U.S. since the pandemic began. The Miami conference had no vaccine verification and masking was rare. Although part of the event was outside, many Bitcoiners crowded into the warehouse-style space and private house parties. It’s wasn’t clear whether the attendees got the disease at the conference itself or at the gatherings. About one in 3,000 Americans tested positive for Covid-19 in the past week, so confirming a discrete Bitcoin 2021 effect requires more than a few tweets.