How much is one swift?

Excuse me, could you clarify something for me? In the context of cryptocurrency or finance, I've come across the term 'one swift' and I'm unsure of its exact meaning. Is it referring to a specific amount of a particular cryptocurrency, perhaps a unit of value? Or is it a colloquialism for something else entirely? Could you please provide me with a concise explanation of what 'one swift' represents in this field?