More than likely my stack will be mostly Gold. Having said that....I want to add silver to the mix in the hopes that the boxes I create for the grand kids will offer maximum downstream growth. I am not a coin collector. I have looked at rounds and bars and my head swims with the number of offerings. My idea is to go big and get the largest bars I can afford..at the lowest premium. The other side of me worries that if the economy fails..the Grand kids won't be able to convert the larger stack. My question probably is not new..but what rounds and size of bars is a good mix for weight vs volume vs best possible gain ????