In this new episode of the Stackers Podcast, we welcome Sébastien Gouspillou, an emblematic figure in Bitcoin mining and renewable energies. With Bitcoin's fourth halving recently passing, Sébastien offers us insight into the implications of this event for miners and the Bitcoin ecosystem as a whole. Sébastien Gouspillou, originally from France and pioneer in the field of Bitcoin mining, shares his unique journey, from his beginnings in agroforestry and real estate to his passion for Bitcoin. His discovery of Bitcoin led him to found BigBlock Datacenter, a leading mining company in France, focused on innovation and sustainability. Bitcoin halving, a mechanism that halves the reward for miners every four years, is at the heart of the discussion. Sébastien explains the impact of this event on mining profitability and the overall Bitcoin economy, as well as the strategies adopted by miners to adapt to these constant changes. A crucial issue addressed is the centralization of hashrate, particularly with regulatory changes in China and the rise of mining in the United States. Sébastien highlights the robustness of the Bitcoin network in the face of these challenges and demystifies fears around possible 51% attacks. Technological advancements in ASICs (Application Specific Integrated Circuits) and the future of mining are also explored. Sébastien discusses the latest advances aimed at improving the energy efficiency of ASICs, while recognizing the current limits of component miniaturization. The sustainability and environmental impact of mining are major concerns. Sébastien shares his initiatives to integrate renewable energy sources into Bitcoin mining, illustrating the sector's potential to contribute to the global energy transition. In conclusion, Sébastien reiterates his commitment to education and innovation in the field of mining. It encourages the Bitcoin community to adopt mining practices that are economically viable and beneficial to society and the environment.