Shalair Armstrong has a busy life. She runs two chiropractic offices in Boston. She has a teenage son. Still, every weekday morning she makes time to buy some bitcoin within earshot of hundreds of strangers.

Dr Armstrong hosts a “room” in the audio social-media channel Clubhouse called “WakeUp With Bitcoin.” Some mornings, listeners can hear her dog barking. It’s a far cry from sitting in an office with your broker.