Of course. A couple people already have their orders in - which, frankly, surprised the heck out of me...
Banked gold is whatever you don't use from your income - and like Wolf said, it's "safe". No one can take it from you. People, on the other hand...
I know I didn't label things very well in those first stats, but "Old Gold" is your income for this turn, and "New Gold" is your estimated income for next turn. I fixed those names for next time.