Where do you get neutrons from?

As a cryptocurrency and finance expert, I often find myself dealing with complex financial concepts and technological advancements, but today's question takes me to a rather unconventional field. Could you please elaborate on the source of neutrons? It's a question that seems to bridge the gap between the financial world and the realm of nuclear physics. Are neutrons somehow relevant to cryptocurrency mining or are they simply an unrelated topic that has piqued my curiosity? I'm genuinely intrigued to learn about the potential intersections between these seemingly disparate fields.