Patrick Byrne is CEO and co-founder of the internet retail company and is CEO of tZero, an ICO training platform he founded. Under his leadership, became first business with more than $1 million in revenue to accept bitcoin as a payment method. Later, using the familiarity gained with the blockchain technology at the heart of digital currencies such as bitcoin, Byrne created Medici Ventures, a subsidiary within devoted to advancing blockchain-based technology solutions. In 2015, he used Medici’s securities trading platform to become the first person to purchase a digital bond entirely on the bitcoin blockchain.