Well it would be nice if this was true: The coin is special because in Isaiah 3:26 back in the 8th-7th century BC he has a vision for the fall of Jerusalem and from the King James Version of the Bible "Her gates shall lament and mourn, And she being desolate shall sit on the ground." So he has a vision but what is a vision except for seeing future events right? So in his mind he sees Jerusalem after Vespasian and Titus are done with it and looking around he sees a lot of future Roman soldiers spending money which on closer inspection indeed has her sitting on the ground. Does seem a bit odd the coin kind of matches so well to what he was seeing.(Obviously that is not at all true but still kind of cool. I am not sure the Tribute penny of Tiberius is that rare either but it certainly commands some money to get one.