Leon Mario Colosimo is a father, entrepreneur, and problem-solver who believes everyday people deserve financial freedom. After twenty years working his way from labourer to senior management in the Australian rail industry, Leon witnessed how unstable financial systems can impact ordinary families. His search for a better path led him to Bitcoin-where he found clarity, empowerment, and a mission to help others break free from the modern money trap. Through 123BTC, Leon shares the lessons he wishes he learned earlier, written for real people who want to create a stronger future. Ardun Ward is an experienced Bitcoin researcher and technical editor who has spent years studying the economic, technological, and social aspects of decentralised digital currency. He contributes deep knowledge of Bitcoin's mechanics, network design, and real-world use cases, helping readers gain clarity and confidence in an often confusing space.