> Me : I think it should mean, you might be the next to be rescued.

But what specifically would you have done differently if you were a hostage and had received this message? Don't answer, "I'd keep up hope." "Not losing hope" is not an action.

The message has no particular call to action. That's my main point. My second point is that even if you named some specific action you'd take, someone else would have had a different idea because it's so vague.

A compassionate message could mean the world to a hostage. That's true. But a compassionate message and a useful message are not the same thing.