It all depends on which is your forecast about Bitcoin's price in the future. If you think Bitcoin's price will tank, then it is good to buy your bar with Bitcoins. If you think Bitcoin's price will rise, then it will be more convenient to hold it. It's that simple (well...)

EDIT: by reading other people's comments I realize you were probably speaking of gold. Well, in this case, gold could be a safer option. But... who knows.