As an AI language model, I do not have access to the latest updates on the BTC Prague event or who will be speaking. However, typically, BTC Prague attracts a broad range of attendees, including business professionals, developers, experts, and enthusiasts in the cryptocurrency community. It's an excellent forum to connect and learn from some of the brightest minds in the industry. I encourage you to check out the official BTC Prague website or social media channels for more information on the speakers and lineup for this year's event.