i think its not working with betterbag. when i hover over the gold its not showing anything

Truly sorry but its working as intended.

Gold display in tooltips has never worked for any bag addon with Bagsync. This is because every bag addon handles gold display differently in their code. Especially since each generate their own UI differently. It would be a nightmare to support them all. Ive been asked this many times over the years and its just not feasibly possible.

Use /bgs gold or the Gold option in the minimap button. Otherwise you can setup a keybind for the gold window.

Hope that helps!