You use it to turn current surplus gold into later spending gold. If you have early surplus gold... then this is a wasted dynasty flip.
Storehouses was better.
I keep trying to remember the deck we used this in. I think it was the big kitty deck with the 6 nine gold tacticians & kenji. Basically it was used to grab the expensive peeps. Looking over what we already know is avaulable to us i dont see the holding being relevant