What is the XBT cast?

Could you please elaborate on what you mean by "XBT cast"? Typically, XBT refers to Bitcoin traded on certain exchanges, but the term "cast" isn't commonly associated with it in a cryptocurrency context. Are you referring to a specific event, a type of broadcast, or perhaps a misspelling of a more familiar term? Clarifying your question would help me provide a more accurate answer. Is it possible you meant to ask about something like a Bitcoin fork, airdrop, or another type of distribution or event related to the cryptocurrency?