Where do you get neutrons?

Excuse me, could you elaborate on the origin of neutrons in a non-technical yet comprehensive manner? I'm curious to understand where these subatomic particles are typically found and how they come into existence. Do they occur naturally in specific environments or are they created through certain processes? I'm particularly interested in how they relate to the broader context of finance and cryptocurrency, though I realize that may be a stretch. Still, any insight you can provide would be greatly appreciated.