My opinion... as for gold, best to get 1 oz coin as they have a lower premium. The smaller the gold coin, the more you pay in dealer premium (amount tacked on to the actual gold value). So for larger amounts of your wealth storage, get 1 oz coins.
For smaller units, daily bartering, etc., get bags of "junk" silver US coins (90% silver).
Adjusted for inflation, gold and silver are very cheap now. To match it's high back in 80 or so, gold would have to be about $2300 (again, adjust for inflation), or so I read recently from an article on Kitco.com.
Be sure to hide it good!