Gathering an emergency supply of money is very important. You need to choose gold and silver, since it will maintain its value, even if the dollar collapses. The question is, though, should you go with gold bullion bars or coins? This is an incredibly important decision and one you should not take lightly.
A lot of people like to go with bars because they cost less upfront. However, bars are easily counterfeited so they need to be verified. Because of that, they might not be worth anything during a disaster. Pay more for coins now so you will have spendable money during the disaster.
Choose coins from reputable mints so people will not question their authenticity. Then, keep them stored until you need them. Once the disaster strikes, you will be pleased that you spent a little bit more for coins that retain their value, regardless of the economic situation.