are you guys always think negative on someone like this? Just be positive, maybe he rarely obtain cards from Card Trader and save up some coins and stones.
Anyway, A Legendary Ocean is a good card if you run out a water deck, especially Daedalus.
From Dueling Bakura and a couple weeks worth of savings I clocked in at 5 mil, it's doable with the events.
I was trying to save up Gold in case they finally added the upgrading rarity feature into the Card Trader, but alas that hasn't happened and I spent most of it :/