Does mega mean 1000?

I'm curious about the term "mega" and its common usage. Specifically, I've heard it used in various contexts, including in the realm of finance and technology. So, I'm wondering: does "mega" really mean 1000, or is it just a colloquial term that's been misinterpreted? Could you clarify the true meaning of "mega" and provide some examples of how it's used in these fields? I'm eager to learn more about this terminology and how it applies to the world of cryptocurrency and finance.